Nickname uncle. After Gem gam became popular through his homemade video, some netizens privately thought that he wanted to learn rap from him. Gem gam asked him how old he was, and he said he was a freshman. Then Gem gam said that I was old enough to be your uncle, and you called me Lao Tie, so later Gem gam thought, just call him Laojiu, and everyone kindly called him Laojiu or uncle.