The signature of WeChat open platform refers to the MD5 fingerprint of WeChat Android certificate. According to WeChat official website query. When developing information, in the development information directory, click the application platform, and then click the Android platform to find the application signature position. The signature of WeChat open platform refers to the MD5 fingerprint of WeChat Android certificate. On the page where the installation package is generated, click the drop-down box of the Android project to display the signature information of the Android application. For the WeChat development platform, just copy the MD5 signature.