Wechatpay Medical Insurance Payment

This handles the full WeChat Pay medical insurance payment integration for China's Mobile Medical Insurance Payment 2.0 system. You get end-to-end coverage: mixed medical insurance and out-of-pocket orders, queries by multiple ID types, refund notifications, and payment callbacks. It supports both direct merchant and service provider modes, walks you through the differences in API paths and signature rules, and includes Java and Go code examples for every endpoint. The quality checks are thorough, covering amount formula validation, encrypted sensitive fields, and idempotent refund handling. When you hit errors, it maps them to root causes instead of making you guess. If you're building hospital registration, pharmacy purchases, or telemedicine checkout in China, this gets you compliant fast.