Safe. According to the query of Tencent official website, Hongdetang WeChat group is safe in class. Hongdetang has an officially authorized official account, so Hongdetang WeChat group is very safe to attend classes. Wechat is a communication software launched by Tencent on 20 1 1. Support sending voice messages, videos, pictures and texts through the mobile phone network, support video calling, find people nearby according to geographical location, share and record your life through friends circle.