What are the general requirements of public temples in Lao Dai?

The three brothers Dai Gong are not only superb in medical skills, but also superb in martial arts. They are brave and fearless. People built Daigong Temple in many places, offering sacrifices and prayers, and burning incense to express their admiration and worship for the heroes. They solemnly declare that their answers are for reference only, so please don't be blind and superstitious.