Legend has it that Yulong was imprisoned by the jade emperor because he couldn't bear to see human beings suffer from drought, which violated heaven and helped human beings to ask for rain. The Jade Emperor made a rule that only golden beans would release jade dragons. Human beings get together to fry corn because they are grateful for Yulong's righteous act. Because corn looks like golden beans, Taibai Venus, who is in charge of Yulong, was mistakenly released to Yulong.
Since then, the custom of frying corn on the second day of February every year has been preserved. It refers to the haircut on February 2 nd, also called "Happy Head", which means that children can grow up healthily and get ahead. It is beneficial for adults to have a haircut, say goodbye to the old and welcome the new in the new year. The answer is for reference only, please don't be blindly superstitious.