The next item is a piece of a legend that has just entered the inner of the academy. It is a recommendation letter from a famous student named Cuixu Luao, who is famous for saving his sister from the taoist when he was five years old. The letter is sold for only five taels, so the students can buy it for as little as one tael. The students are not allowed to buy the letter from outside the academy, so they have to buy it from the inner. .