Pinyin: y and d ē ng ló ng mé n
Source: Li Yingchuan of the Later Han Dynasty: "A scholar accepted by him is called Deng Longmen."
Example: Tang Li Bai's Hanshu Jingzhou: "Once on the Longmen, the price is ten times."
Idiom story
Li Bai, a poet in the Tang Dynasty, began to travel around the world at the age of 25 and wrote many well-known poems. However, in his thirties, he had not yet become an official. He heard that there was a long history of Jingzhou in the Han Dynasty, and he was particularly fond of recommending talents, so he wrote a book with Emperor Han Jingdi: "I heard that' I was born without sealing Wan Huhou, and I hope to know Emperor Han Jingdi'. Once you introduce me, it will be worth ten times as much as a carp. "