Waiter and Waiter is a character in Pipa Trip written by Tang Dynasty poet Bai Juyi, which describes a woman named Waiter and Waiter playing the pipa. The prototype of the wise man in Tang Dynasty is Ma Ling, a writer, calligrapher and painter in Tang Dynasty. It is said that Maling is good at playing the pipa, and his pipa art and talent were highly appreciated by people at that time, and he was known as the "Pipa Generation". Bai Juyi borrowed the image of Ma Ling in Pipa and created the image of the wise man in Tang Dynasty.