Cheongsam Market Analysis from 2022 to 2034 Containing Market Size, Share along with its CAGR, Forecast and Trends

Top Countries — Revenue

USD Million/Billion
Loading…

Access the full forecast model.

Country-level data · Company profiles · Editable dataset · Analyst consultation included.

Cheongsam Market Analysis — Presence

Geographical Analysis

Click countries to explore
Loading map…

Regional and Country Analysis

Region / Country 2021 (A)2025 (A)2033 (P) CAGR
Globalxxxxxxxxxxxx6%
North Americaxxxxxxxxxxxx4.2%
United Statesxxxxxxxxxxxxxxxx
Canadaxxxxxxxxxxxxxxxx
Mexicoxxxxxxxxxxxxxxxx
Europexxxxxxxxxxxx4.5%
United Kingdomxxxxxxxxxxxxxxxx
Francexxxxxxxxxxxxxxxx
Germanyxxxxxxxxxxxxxxxx
Italyxxxxxxxxxxxxxxxx
Russiaxxxxxxxxxxxxxxxx
Spainxxxxxxxxxxxxxxxx
Swedenxxxxxxxxxxxxxxxx
Denmarkxxxxxxxxxxxxxxxx
Switzerlandxxxxxxxxxxxxxxxx
Luxembourgxxxxxxxxxxxxxxxx
Rest of Europexxxxxxxxxxxxxxxx
Asia Pacificxxxxxxxxxxxx8%
Chinaxxxxxxxxxxxxxxxx
Japanxxxxxxxxxxxxxxxx
South Koreaxxxxxxxxxxxxxxxx
Indiaxxxxxxxxxxxxxxxx
Australiaxxxxxxxxxxxxxxxx
Singaporexxxxxxxxxxxxxxxx
Taiwanxxxxxxxxxxxxxxxx
South East Asiaxxxxxxxxxxxxxxxx
Rest of APACxxxxxxxxxxxxxxxx
South Americaxxxxxxxxxxxx5.4%
Brazilxxxxxxxxxxxxxxxx
Argentinaxxxxxxxxxxxxxxxx
Colombiaxxxxxxxxxxxxxxxx
Peruxxxxxxxxxxxxxxxx
Chilexxxxxxxxxxxxxxxx
Rest of South Americaxxxxxxxxxxxxxxxx
Middle Eastxxxxxxxxxxxx5.7%
Saudi Arabiaxxxxxxxxxxxxxxxx
Turkeyxxxxxxxxxxxxxxxx
UAExxxxxxxxxxxxxxxx
Egyptxxxxxxxxxxxxxxxx
Qatarxxxxxxxxxxxxxxxx
Rest of Middle Eastxxxxxxxxxxxxxxxx
Africaxxxxxxxxxxxxxxxx
East Africaxxxxxxxxxxxxxxxx
West Africaxxxxxxxxxxxxxxxx
North Africaxxxxxxxxxxxxxxxx
South Africaxxxxxxxxxxxxxxxx

A = Actual · E = Estimated · P = Projected · 🔒 Locked values require full access. Click headers to sort.

Unlock full regional dataset →

Segmentation Analysis


Market size by (Illustrative, 2025)
Share distribution (2025)

Charts are illustrative — exact values, country-level breakdowns, and full forecast in the paid report. Request a Free Sample PDF.

To learn more about market share and segmentation, request the free sample pages.

Competitor Analysis

Competitive Landscape of the Cheongsam Market

The cheongsam market is highly competitive with major players. These companies focus on innovation, partnerships, and extensive distribution networks to maintain their market positions. Additionally, regional players contribute significantly to the market dynamics by offering diverse varieties and catering to local preferences.

Click any bar or cell to request the full company profile
Top Companies (In no particular order)2022 (A)2023 (A)2024 (A)2025 (A)
Yi-ming••• ••• ••• •••
REFOSIAN••• ••• ••• •••
Nanjing Tao Yumei••• ••• ••• •••
Ruifuxiang••• ••• ••• •••
Yangcaoyun••• ••• ••• •••
Beijing Gege Cheongsam Co••• ••• ••• •••
Jiang Nan Qi Pao Clothing Co••• ••• ••• •••

We Provide Regional Breakdown of this Companies and Company specific to any Country, Region, Product/ service as well. We cover market share analysis for publicly listed companies as well as privately held companies, subject to data availability.

Request company profile for validation →

Report Scope & Analysis

According to Cognitive Market Research, the global cheongsam market size was USD XX million in 2024 and will expand at a compound annual growth rate (CAGR) of 6.00% from 2024 to 2031.

  • North America held the major market, accounting for more than 40% of global revenue. With a market size of USD XX million in 2024, it will grow at a compound annual growth rate (CAGR) of 4.2% from 2024 to 2031.
  • Europe accounted for a share of over 30% of the global market size of USD XX million.
  • Asia Pacific held a market of around 23% of the global revenue with a market size of USD XX million in 2024 and will grow at a compound annual growth rate (CAGR) of 8.0% from 2024 to 2031.
  • Latin America's market has more than 5% of the global revenue, with a market size of USD XX million in 2024, and will grow at a compound annual growth rate (CAGR) of 5.4% from 2024 to 2031.
  • Middle East and Africa held the major market of around 2% of the global revenue with a market size of USD XX million in 2024 and will grow at a compound annual growth rate (CAGR) of 5.7% from 2024 to 2031.
  • The knee-length cheongsam segment held the highest cheongsam market revenue share in 2024.

Introduction of the Cheongsam Market

The cheongsam is most often seen as a longer, figure-fitting, one-piece garment with a standing collar, an asymmetric, left-over-right opening, and two side slits, and embellished with Chinese frog fasteners on the lapel and the collar. The advancement of online retail platforms has revolutionized the cheongsam market by extending its reach beyond customary brick-and-mortar stores. These platforms deliver a convenient and accessible way for customers worldwide to investigate and purchase a wide variety of cheongsam dresses. With improved visibility and searchability, shoppers can effortlessly discover amazing designs, compare costs, and access tailored sizing options. Moreover, online platforms promote direct engagement between buyers and sellers, promoting a sense of community and allowing customization services. This digital transformation has fueled the global popularity and commercial success of cheongsam fashion.

Another significant driver shaping the cheongsam market is the rising interest in preserving and celebrating traditional Chinese culture, which has sparked a renewal in the cheongsam market. As a symbol of Chinese heritage, the cheongsam embodies centuries of cultural importance and artistic craftsmanship. This revival is driven by a passion to reconnect with cultural origins, both domestically and internationally. Modern adaptations and innovative designs infuse the cheongsam with modern appeal, drawing a younger demographic while retaining its timeless elegance. As a result, the market for cheongsam dresses continues to thrive, mirroring a global appreciation for Chinese tradition and craftsmanship.

Analyst Conclusion

  • The global cheongsam market will expand significantly by 6.00% CAGR between 2024 and 2031.
  • Knee-length cheongsams are the dominating category due to modern fashion trends. They appeal to younger demographics seeking a fusion of traditional elegance with contemporary style.
  • The dominating category is online due to broadening consumer reach, enabling customization, and fostering cultural appreciation through digital channels.

Anushka Gore
Anushka Gore Verified Analyst
Senior Research Associate at Cognitive Market Research · Cognitive Market Research
LinkedIn Profile Book a free Consultation

Frequently Asked Questions

The global market size for cheongsam in 2024 was USD XX million.
The global market for cheongsam is expected to grow at a CAGR of 6.00% over the projected period.
North America held a significant global share of cheongsam market revenue in 2024.
Asia-Pacific will witness the fastest growth of the global cheongsam market over the coming years.
The US had the most significant global cheongsam market revenue share in 2024.
The main drivers of the growth of the cheongsam market are the growing demand for personalized and bespoke clothing, increasing tourism to China, the rise of online retail platforms, and growing interest in preserving and celebrating traditional Chinese culture.
By application, the adult segment had the largest share in the global cheongsam market.

★ Reviews

Rate this report

Cheongsam Market Analysis — Table of Contents

Disclaimer:
  • This is just a redacted sample pages of the actual deliverable report and only for representative purposes
  • Charts/Graphs/Numbers/data are only for Representative purposes and do not depict actual statistics.
  • The table of Contents differs according to the user License selection. Current Displayed TOC is for the Corporate User License Report Edition. TOC Customization options: Add or Remove section/s Or chapter/s from the report.
  • Specific Tables, Graphs, Sections, and Chapters can be ordered at a discounted price.
  • If applicable; On Request Volume Data will also be provided (at an Additional Cost).

Type Long Cheongsam, Knee Length Cheongsam, Short Cheongsam
Application Adult, Children
Distribution Channel Online, Offline
List of Competitors Yi-ming, REFOSIAN, Nanjing Tao Yumei, Ruifuxiang, Yangcaoyun, Beijing Gege Cheongsam Co, Jiang Nan Qi Pao Clothing Co

  • 1.1 Top Competitors Analysis

    • (Subject to Data Availability (Private Players))

      1.1.1 Global Cheongsam Market Analysis by Key Players
    • 1.1.2 Segment Market Analysis by Key Players
    • 1.1.3 Top Players Ranking 2024
    • 1.1.4 New Product Launch Analysis
    • 1.1.5 Industry Mergers and Acquisition Analysis
  • 1.2 Company Profile (Data Subject to Availability) Sample Format

    • Data Subject to Availability as we consider Top competitors and their market share will be delivered.

      1.2.1 Yi-ming
      • 1.2.1.1 Company Basic Information, Manufacturing Base, Sales Area, and Competitors
      • 1.2.1.2 Business Overview
      • 1.2.1.3 Financials (Subject to data availability)
      • 1.2.1.4 R&D Investment (Subject to data availability)
      • 1.2.1.5 Product Types Specification
      • 1.2.1.6 Business Strategy
      • 1.2.1.7 Recent Developments
      • 1.2.1.8 Management Change
      • 1.2.1.9 S.W.O.T Analysis

    • Data Subject to Availability as we consider Top competitors and their market share will be delivered.

      1.2.2 REFOSIAN
      • 1.2.2.1 Company Basic Information, Manufacturing Base, Sales Area, and Competitors
      • 1.2.2.2 Business Overview
      • 1.2.2.3 Financials (Subject to data availability)
      • 1.2.2.4 R&D Investment (Subject to data availability)
      • 1.2.2.5 Product Types Specification
      • 1.2.2.6 Business Strategy
      • 1.2.2.7 Recent Developments
      • 1.2.2.8 Management Change
      • 1.2.2.9 S.W.O.T Analysis

    • Data Subject to Availability as we consider Top competitors and their market share will be delivered.

      1.2.3 Nanjing Tao Yumei
      • 1.2.3.1 Company Basic Information, Manufacturing Base, Sales Area, and Competitors
      • 1.2.3.2 Business Overview
      • 1.2.3.3 Financials (Subject to data availability)
      • 1.2.3.4 R&D Investment (Subject to data availability)
      • 1.2.3.5 Product Types Specification
      • 1.2.3.6 Business Strategy
      • 1.2.3.7 Recent Developments
      • 1.2.3.8 Management Change
      • 1.2.3.9 S.W.O.T Analysis

    • Data Subject to Availability as we consider Top competitors and their market share will be delivered.

      1.2.4 Ruifuxiang
      • 1.2.4.1 Company Basic Information, Manufacturing Base, Sales Area, and Competitors
      • 1.2.4.2 Business Overview
      • 1.2.4.3 Financials (Subject to data availability)
      • 1.2.4.4 R&D Investment (Subject to data availability)
      • 1.2.4.5 Product Types Specification
      • 1.2.4.6 Business Strategy
      • 1.2.4.7 Recent Developments
      • 1.2.4.8 Management Change
      • 1.2.4.9 S.W.O.T Analysis

    • Data Subject to Availability as we consider Top competitors and their market share will be delivered.

      1.2.5 Yangcaoyun
      • 1.2.5.1 Company Basic Information, Manufacturing Base, Sales Area, and Competitors
      • 1.2.5.2 Business Overview
      • 1.2.5.3 Financials (Subject to data availability)
      • 1.2.5.4 R&D Investment (Subject to data availability)
      • 1.2.5.5 Product Types Specification
      • 1.2.5.6 Business Strategy
      • 1.2.5.7 Recent Developments
      • 1.2.5.8 Management Change
      • 1.2.5.9 S.W.O.T Analysis

    • Data Subject to Availability as we consider Top competitors and their market share will be delivered.

      1.2.6 Beijing Gege Cheongsam Co
      • 1.2.6.1 Company Basic Information, Manufacturing Base, Sales Area, and Competitors
      • 1.2.6.2 Business Overview
      • 1.2.6.3 Financials (Subject to data availability)
      • 1.2.6.4 R&D Investment (Subject to data availability)
      • 1.2.6.5 Product Types Specification
      • 1.2.6.6 Business Strategy
      • 1.2.6.7 Recent Developments
      • 1.2.6.8 Management Change
      • 1.2.6.9 S.W.O.T Analysis

    • Data Subject to Availability as we consider Top competitors and their market share will be delivered.

      1.2.7 Jiang Nan Qi Pao Clothing Co
      • 1.2.7.1 Company Basic Information, Manufacturing Base, Sales Area, and Competitors
      • 1.2.7.2 Business Overview
      • 1.2.7.3 Financials (Subject to data availability)
      • 1.2.7.4 R&D Investment (Subject to data availability)
      • 1.2.7.5 Product Types Specification
      • 1.2.7.6 Business Strategy
      • 1.2.7.7 Recent Developments
      • 1.2.7.8 Management Change
      • 1.2.7.9 S.W.O.T Analysis

  • 2.1 Global Cheongsam Market Analysis
  • 2.2 Global Cheongsam Market Analysis by Region
  • 2.3 Global Cheongsam Market Analysis by Type
  • 2.4 Global Cheongsam Market Analysis by Application
  • 2.5 Global Cheongsam Market Analysis by Distribution Channel
  • 2.6 Global Cheongsam Market Analysis by Key Players

  • 3.1 North America Cheongsam Market Analysis
  • 3.2 North America Cheongsam Market Analysis by Country
  • 3.3 North America Cheongsam Market Analysis by Type
  • 3.4 North America Cheongsam Market Analysis by Application
  • 3.5 North America Cheongsam Market Analysis by Distribution Channel
  • 3.6 North America Cheongsam Market Analysis by Key Players

  • 4.1 Europe Cheongsam Market Analysis
  • 4.2 Europe Cheongsam Market Analysis by Country
  • 4.3 Europe Cheongsam Market Analysis by Type
  • 4.4 Europe Cheongsam Market Analysis by Application
  • 4.5 Europe Cheongsam Market Analysis by Distribution Channel
  • 4.6 Europe Cheongsam Market Analysis by Key Players

  • 5.1 Asia Pacific Cheongsam Market Analysis
  • 5.2 Asia Pacific Cheongsam Market Analysis by Country
  • 5.3 Asia Pacific Cheongsam Market Analysis by Type
  • 5.4 Asia Pacific Cheongsam Market Analysis by Application
  • 5.5 Asia Pacific Cheongsam Market Analysis by Distribution Channel
  • 5.6 Asia Pacific Cheongsam Market Analysis by Key Players

  • 6.1 South America Cheongsam Market Analysis
  • 6.2 South America Cheongsam Market Analysis by Country
  • 6.3 South America Cheongsam Market Analysis by Type
  • 6.4 South America Cheongsam Market Analysis by Application
  • 6.5 South America Cheongsam Market Analysis by Distribution Channel
  • 6.6 South America Cheongsam Market Analysis by Key Players

  • 7.1 Middle East Cheongsam Market Analysis
  • 7.2 Middle East Cheongsam Market Analysis by Country
  • 7.3 Middle East Cheongsam Market Analysis by Type
  • 7.4 Middle East Cheongsam Market Analysis by Application
  • 7.5 Middle East Cheongsam Market Analysis by Distribution Channel
  • 7.6 Middle East Cheongsam Market Analysis by Key Players

  • 8.1 Africa Cheongsam Market Analysis
  • 8.2 Africa Cheongsam Market Analysis by Country
  • 8.3 Africa Cheongsam Market Analysis by Type
  • 8.4 Africa Cheongsam Market Analysis by Application
  • 8.5 Africa Cheongsam Market Analysis by Distribution Channel
  • 8.6 Africa Cheongsam Market Analysis by Key Players

  • 9.1 Long Cheongsam
    • 9.1.1 Global Long Cheongsam Market
    • 9.1.2 Global Long Cheongsam Market by Region
  • 9.2 Knee Length Cheongsam
    • 9.2.1 Global Knee Length Cheongsam Market
    • 9.2.2 Global Knee Length Cheongsam Market by Region
  • 9.3 Short Cheongsam
    • 9.3.1 Global Short Cheongsam Market
    • 9.3.2 Global Short Cheongsam Market by Region

  • 10.1 Adult
    • 10.1.1 Global Adult Market
    • 10.1.2 Global Adult Market by Region
  • 10.2 Children
    • 10.2.1 Global Children Market
    • 10.2.2 Global Children Market by Region

  • 11.1 Online
    • 11.1.1 Global Online Market
    • 11.1.2 Global Online Market by Region
  • 11.2 Offline
    • 11.2.1 Global Offline Market
    • 11.2.2 Global Offline Market by Region

  • 12.1 Market Drivers
  • 12.2 Market Restraints
  • 12.3 Market Trends
  • 12.4 Market Opportunity
  • 12.5 Technological Road Map (Subject to Data Availability)
  • 12.6 Product Life Cycle (Subject to Data Availability)
  • 12.7 Customer and Buyer Behavior Analysis
    • 12.7.1 Consumer Demographics and Target Audience Assessment
    • 12.7.2 Digital Engagement, Customer Experience & Relationship Analysis
    • 12.7.3 Customer Buying Behavior & Purchase Decision Analysis
    • 12.7.4 Vendor Selection, Supplier Preferences & Future Demand Trends
    • 12.7.5 Pricing, Affordability & Value Perception Analysis
    • 12.7.6 Customer Segmentation & Demand Pattern Analysis
  • 12.8 PESTEL Analysis
    • 12.8.1 Political Factors
    • 12.8.2 Economic Factors
    • 12.8.3 Social Factors
    • 12.8.4 Technological Factors
    • 12.8.5 Legal Factors
    • 12.8.6 Environmental Factors
  • 12.9 Industrial Chain Analysis (Subject to Data Availability)
    • 12.9.1 Industry Chain Analysis
    • 12.9.2 Manufacturing Cost Analysis
    • 12.9.3 Supply Side Analysis
      • 12.9.3.1 Raw Material Analysis
      • 12.9.3.2 Raw Material Procurement Analysis
      • 12.9.3.3 Raw Material Price Trend Analysis
  • 12.10 Porter’s Five Forces Analysis
    • 12.10.1 Bargaining Power of Suppliers
    • 12.10.2 Bargaining Power of Buyers
    • 12.10.3 Threat of New Entrants
    • 12.10.4 Threat of Substitutes
    • 12.10.5 Degree of Competition
  • 12.11 Patent Analysis (Subject to Data Availability)
  • 12.12 ESG Analysis
  • 12.13 Geopolitical Outlook
    • 12.13.1 Global Power Realignment & Strategic Alliances
    • 12.13.2 Geopolitical Risk Landscape & Conflict Hotspots
    • 12.13.3 International Trade Relations & Market Access Environment
    • 12.13.4 Regulatory & Policy Shifts Impacting Cross-Border Operations
    • 12.13.5 Supply Chain Resilience, Localization & Resource Nationalism
    • 12.13.6 Technology Sovereignty & Digital Geopolitics
    • 12.13.7 Strategic Implications for Investment, Growth & Market Entry

  • This chapter isn't just about technology; it’s about certainty. We show you how AI is being used in leading industries so you can apply those same 'High-Speed' and 'High-Accuracy' principles to your own market strategy

    12.14 AI & Market Transformation
    • 12.14.1 Competitive Landscape Disruption & Strategic Shifts
    • 12.14.2 AI-Driven Transformation of Industry Value Chain
    • 12.14.3 Evolution of Business Models & Revenue Streams
    • 12.14.4 AI-Driven Product, Service & Innovation Transformation
    • 12.14.5 Customer Behavior, AI Adoption & Future Market Evolution

  • 13.1 Country 1
    • 13.2 Country 2
    • 13.3 Country 3
    • 13.4 Country 4
    • 13.5 Country 5
    • 13.6 Country 6
    • 13.7 Country 7
    • 13.8 Country 8
    • 13.9 Country 9
    • 13.10 Country 10

    • 14.1 Key Takeaways

    • Here the analyst will summarize the content of entire report and will share his view point on the current industry scenario and how the market is expected to perform in the near future. The points shared by the analyst are based on his/her detailed in-depth understanding of the market during the course of this report study. You will be provided exclusive rights to interact with the concerned analyst for unlimited time pre purchase as well as post purchase of the report.

      14.2 Analyst Point of View
    • 14.3 Assumptions and Acronyms

    • 15.1 Primary Data Collection
      • 15.1.1 Steps for Primary Data Collection
        • 15.1.1.1 Identification of KOL
      • 15.1.2 Backward Integration
      • 15.1.3 Forward Integration
      • 15.1.4 How Primary Research Help Us
      • 15.1.5 Modes of Primary Research
    • 15.2 Secondary Research
      • 15.2.1 How Secondary Research Help Us
      • 15.2.2 Sources of Secondary Research
    • 15.3 Data Validation
      • 15.3.1 Data Triangulation
    • 15.4 Data Representation

    Athenaeum AI Dashboard

    Research Framework · 70:30 Primary:Secondary

    Our Proprietary Methodology

    Cognitive Market Research and Consulting "The Full Truth" methodology — a rigorous triangulation process that combines primary research, secondary validation, and expert calibration. Implemented by Anushka Gore and team for the Cheongsam Market Analysis Market analysis.

    01

    Primary Intelligence Gathering

    Direct interviews with 50+ industry stakeholders including manufacturers, distributors, end-users, and regulatory bodies across all six regions.

    02

    Secondary Data Triangulation

    Cross-referencing against trade databases, customs records, financial filings, patent databases, and verified industry publications.

    03

    Expert Validation Protocol

    Each data point undergoes validation by minimum two independent domain experts with 15+ years of industry experience.

    04

    Athenaeum AI Processing

    Our proprietary AI platform aggregates, normalizes, and identifies patterns across 10,000+ data points to surface non-obvious insights.

    05

    Editorial & QA Review

    Final review by senior analysts ensures accuracy, coherence, and actionability of all insights and recommendations.

    Data Assurance Metrics
    Data Points Validated 10,400+
    Expert Interviews 54
    Countries Covered 39+
    Company Profiles 7+
    Forecast Accuracy (Historical) 94.2%
    Report Pages 250+
    Analytical Coverage
    Market Sizing Revenue Forecast CAGR Analysis Competitor Benchmarking SWOT Porter's Analysis PESTEL Value Chain ESG Analysis Tariff Impact Patent Mapping Tech Trends

    To maintain the integrity of our proprietary methodology and protect our elite expert network, specific source disclosures are reserved for full-access partners. Our research framework is anchored by a 70:30 primary-to-secondary ratio, ensuring your strategy is driven by real-time market intelligence rather than recycled, publicly available, or AI-generated data. Every deliverable includes an exhaustive source directory and grants direct analyst access.

    Sources from the Consumer Industry

    How We Serve You

    The Three Pillars of End-to-End Market Research Services

    We don't just hand over data. We partner with your team across three integrated service lines — each designed to give you decision-grade intelligence on the Cheongsam Market Analysis market.

    Service 01

    Market Survey

    B2B B2C

    Structured primary research across both B2B and B2C channels. We design and execute custom surveys targeting manufacturers, distributors, procurement heads, and end-consumers in the cheongsam market analysis ecosystem — validated by our global panel of 10,000+ industrial respondents.

    What's Included
    • Buyer intent & sentiment analysis
    • Purchase cycle mapping
    • Price sensitivity research
    • Channel preference profiling
    • Competitive perception study
    Most Requested
    Service 02

    Customized Market Data & Reports

    Custom Ready Report

    Choose from our ready-to-access 8th Edition report or commission a fully customized dataset tailored to your exact strategic questions. Cross-splits, custom geographies, proprietary segmentation — we build the intelligence asset your board actually needs.

    What's Included
    • Ready syndicate report (250+ pages)
    • Custom data scope & segmentation
    • Excel quantitative models
    • Board-ready PPT with key findings
    • Secure cloud portal access
    Service 03

    Strategic Consultation

    With Survey With Report

    Every survey and every report comes with dedicated analyst consultation. Our senior research team walks your leadership through findings, answers strategic questions in real-time, and helps translate data into your next board presentation or investment thesis.

    What's Included
    • Dedicated analyst assigned to you
    • Live walkthrough of findings
    • Strategic Q&A sessions
    • Go-to-market recommendations
    • NDA-protected engagement

    Customize This Report

    Tell us the specific segments, regions, or companies you need — and we will tailor the deliverable to your requirements.