You won't find it. According to the official news released by WeChat, WeChat's personality signature has no historical record, and the record of WeChat friends circle will always be there, so there is no historical signature. Wechat is a free application launched by Tencent on 201110, which provides instant messaging service for intelligent terminals. It was created by the product team of Tencent Guangzhou R&D Center led by Zhang Xiaolong.