Publicity. According to Tian Yan News official website information query, Tik Tok has so many live postal broadcasts mainly for publicity, which is a live matrix created by China Post. Postal live broadcast was initiated by China Post, and China Post MCN Operation Center was established, which was responsible for anchor training, professional support and supply chain cooperation. The products in the postal live broadcast room are mainly divided into beauty products, agricultural and sideline products and snacks.