Who is the fat fairy in a white coat and beard?

The fat white-bearded fairy in a white coat is Venus Taibai.

In the TV series The Journey to the West, he is a white-haired, kind-looking old man, with white hair and beard, floating dust in his hand and white clothes.

Taibai Venus is one of the most famous gods among Chinese folk beliefs and Taoist immortals. In the Taoist myth system, he is only the messenger of the Jade Emperor.