In-App Payment
Users make purchases in merchant apps using WeChat Pay.
Merchants with an app with a large number of Chinese users are recommended to integrate WeChat Pay into their app. Once integrated, WeChat users can easily complete transactions using WeChat Pay through the merchant's app. On the merchant side, an open SDK integrated into the mobile app calls the WeChat Pay module to complete transactions.
How to set up WeChat Pay
The app's Appid is linked to the Merchant ID. Note: The service provider's Appid cannot be linked to a Submerchant ID. Only an Appid belonging to a submerchant can be linked to a Submerchant ID. The Appid and the Merchant ID entity must be the same.