Why are Andox and Heizai Andy Lau's sons?

Andox and Heizi are puppets that Andy Lau sewed for her mother's birthday. Because I was too busy to spend my birthday with her, I made two dolls. Later, real people created two lovely Andox and Black Boy and two calf dolls. They are two sons of King Andy Lau. They call Andy Lau mother. Andox was inspired by Andy Lau when he planned the album Fantasy World of Cattle. He spent a whole day on the location of the film "See the Dragon and Dismantle the Dragon" in Gansu. Andy Lau said that he felt the feeling of being a mother, and at the same time, his son Andox was the best Mother's Day gift for himself.

Later, in order to make Andox not lonely, she gave birth to a black boy.