Brother Xiao Yuan and Uncle Yang have a grandson relationship. According to the relevant information, Brother Xiao Yuan and Uncle Yang collaborated to shoot short videos on Douyin. Brother Xiao Yuan came to send blessings to Uncle Yang on his birthday. Many people said that Brother Xiao Yuan and Uncle Yang are related by grandfather and grandson. Douyin is a music and creative short video social software incubated by ByteDance. The software was launched on September 20, 2016. It is a short video community platform for all ages.