What does a white hat on the head of a Hui boy symbolize?

The small white hat without eaves worn by Hui people is also called "top hat", "filial hat", "back hat" or "counting hat", which indicates the number and symbol of Hui people. This kind of hat originated in Arabia, the birthplace of Islam, where the weather is hot and the sunshine time is long. People usually wear white hats to reflect sunlight radiation.