No.

Zhang Shurui and his uncle are partners. Uncle Zhang Shurui calls him Dadong and he has no blood relationship with Zhang Shurui’s father. They are just brothers.

Douyin is a music and creative short video social software incubated by ByteDance. This software was launched on September 20, 2016. It is a short video community platform for all ages. Users can choose songs through this software and shoot musical works to form their own works.