The proprietary image format WXAM or wxHEPC developed by Tencent and used e.g. within WeChat is apparently based upon HEVC,[29] as is SharpP, which was developed by their SNG (Social Network Group) division.[30][31] However, their container format may not be HEIF-compatible. In March 2017, SharpP switched to AVS2[32] and was renamed TPG (Tiny Portable Graphics).[31][33]