What is the final ending of the prodigal Yan Qing in Water Margin?

After Liang Shanjun pacified Fang La, Yan Qing lived in seclusion.

After Liang Shanjun pacified Fang La, he moved troops back to Chaoxian. Yanqing went to see Lu Junyi privately, and advised him to retire quickly and remain anonymous for the rest of his life. Lu Junyi refused. Yanqing remonstrated with Emperor Gaozu about killing the hero, but Lu Junyi refused. He had to leave Lu Junyi and leave a book for Song Jiang. He left the army that night and his whereabouts are unknown.

Yan Qing, a native of Beijing Daming Mansion, was raised by the Lujia family after his parents died at an early age. He is Lu Junyi's confidant servant. He is full of embroidery, good at using crossbows, proficient in sumo, skilled in martial arts, versatile, able to play, sing and jump, and can do anything in any place.

After Song Jiang succeeded Liangshan Castellan, in order to strengthen Liangshan's momentum, he sent Wu Yong, a strategist, to earn Lu Junyi to go up the mountain. Wu Yong pretended to be a fortune-teller, and mixed with Rufu to tell Lu Junyi's fortune, saying that he wanted a bloodbath and fled to the southeast. Lu Junyi was convinced that he would take Gu Li, the housekeeper, to Taian to do business, so as not to get into trouble, leaving Yanqing to look after the warehouse at home.

Yan Qing strongly discouraged him from going to Tai 'an, thinking that it was unsafe to take the water margin. He also pointed out that the fortune teller must be the middleman of Liangshan, trying to trick Lu Junyi into going up the mountain. Lu Junyi wouldn't listen. Yanqing wanted to go with him again, but Lu Junyi refused.

Later, I went to Liangshan with Lu Junyi. He is an all-rounder with both civil and military skills. When he went to Liangshan, he ranked 36 th. He should be a "smart star" and be the leader of the infantry. I once met Song Huizong in Li Shishi, Tokyo, and he helped me recruit Liangshan. Fang La retired from the Jianghu after enlisting.

Baidu encyclopedia-Yan Qing