Ipartment 4 episode 1 Who is a charlatan?

Master Huang is a fake doctor who lets Lu play Sudoku. He's really crazy. He appeared in the early series of ipartment before. In the fourth season of "ipartment", Master Huang plays a swindler who sells medicine for traumatic injuries, and his strong local accent is impressive. We don't know the real identity of this actor at present, so we need to dig it up later.