Which book is the yellow joke in classical Chinese

It is said that the word "easy" comes from Qianlong, Ji Xiaolan said "difficult", Qianlong said "easy" and Ji Xiaolan said "difficult".

Tell another interesting story told by an old man before;

When Gan Long went down to the south of the Yangtze River, he often dressed as a tourist in plain clothes, perhaps accompanied by Ji Xiaolan. One day, he went to a farmer's house. Lao shifu is a quilt maker, playing bamboo mats. The old man is making bamboo strips. Gan Long picked up a bamboo stick and asked the sewing worker, What's this called? The craftsman replied; This is "bamboo skin". Ganlong picked up another bamboo stick and asked the craftsman, what is this called? The craftsman replied; This is "bamboo meat".

This story is not to say that Jiangnan people may not know the mystery inside. In fact, Jiangnan people call "bamboo skin" green, which is the same as "Jue", and bamboo meat is called "yellow" and "Jue". If you say that, the craftsman will be miserable.