# 3721zh.com (转换商城 / Zhuanhuan Mall)

> 3721zh.com is the public domain of 转换商城 (Zhuanhuan Mall, "Conversion Mall"), a local-life
> private-domain e-commerce platform operated by 转换空间（上海）电子商务有限公司 (Zhuanhuan Space
> (Shanghai) E-Commerce Co., Ltd.), founded in 2018 and headquartered in Shanghai, China. It pairs a
> free-to-merchant SaaS with a branded-goods supply chain, fulfilment, and private-domain traffic
> build-out and agency operation, so catering, property-management, beauty, hotel, foot-bath,
> tea-house, education and retail-chain merchants can convert in-store spend into equivalent-value
> goods, vouchers, coupons and memberships.

## Status of the developer surface

- **No public API.** As of a 2026-09-05 probe the company publishes no developer portal, no API
  reference, no OpenAPI/Swagger/GraphQL/AsyncAPI document, no SDK, no `/llms.txt`, no
  `/.well-known/` document and no agent card on any host it operates.
- The company's own About page lists "API接口" (API interfaces) as one delivery mode of its service
  system, alongside WeCom, WeCom communities, WeChat mini programs and private deployment — but the
  contract behind it is not published. Access is arranged through the merchant-onboarding form and a
  sales conversation.
- `gw.3721zh.com` is a live first-party API gateway that answers every unauthenticated path with the
  same JSON envelope (`{"code":99101,"message":"您的参数错误,请检查相关配置参数!","data":null}`). It
  is the backend of the company's own consumer/merchant web app and carries no published contract,
  no documentation and no discovery document.

## Site

- [转换商城 官网 / Homepage](https://www.3721zh.com/): Static brochure site, eight pages, Simplified Chinese.
- [关于我们 / About](https://www.3721zh.com/aboutUS.html): Company profile, founder history, business lines, funding narrative.
- [门店增长案例 / Case studies](https://www.3721zh.com/video.html): Merchant growth case videos.
- [商户入驻 / Merchant onboarding](https://www.3721zh.com/merchantEntry.html): Lead form — the only route to an integration.
- [商品入驻 / Product onboarding](https://www.3721zh.com/commodityEntry.html): Supplier/product listing lead form.
- [诚聘英才 / Careers](https://www.3721zh.com/joinUs.html): Open roles, including an architect role describing a Java/Spring Cloud/Dubbo microservice estate.
- [联系我们 / Contact](https://www.3721zh.com/contactUs.html): Customer-service line 400-720-0000, 09:00–21:00 CST.

## Policies

- [转换商城供应商版隐私政策 / Supplier-edition privacy policy](https://v.3721zh.com/zhkjgysys.html): Version dated 2020-12-20, entity 转换空间（上海）电子商务有限公司.

## Applications

- [v.3721zh.com](https://v.3721zh.com/): Vue single-page consumer/merchant web app. Its catch-all answers 200 with the same HTML shell for every unknown path, so a 200 there is not evidence a document exists.
- [updateapp.3721zh.com](https://updateapp.3721zh.com/): Mobile app download hand-off page (WeChat "open in browser" instructions).

## Elsewhere

- [EquityZen — 3721zh.com](https://equityzen.com/company/3721zhcom): Secondary-market listing (ticker TSTO).

## API Evangelist artifacts

- [apis.yml](../apis.yml): The APIs.json profile for this company.
- [well-known/3721zhcom-well-known.yml](../well-known/3721zhcom-well-known.yml): Probe record — nine `/.well-known/` paths across four hosts, zero documents served.
- [security/3721zhcom-domain-security.yml](../security/3721zhcom-domain-security.yml): Probed TLS/HSTS/DNSSEC/CAA/SPF/DMARC posture.
- [plans/3721zhcom-plans-pricing.yml](../plans/3721zhcom-plans-pricing.yml): Pricing search — no published plans.

method: generated
source: apis.yml + the artifacts in this repository
generated: 2026-09-05

This llms.txt was generated by the API Evangelist enrichment pipeline from publicly reachable pages;
it is not published by 3721zh.com.