When did Qin Qiong stand guard for Emperor Taizong and Li Shimin?

See for yourself what happened in the early years of the Tang Dynasty. Here's what I learned for you. It is said that at the beginning of the founding of the Tang Dynasty, the old dragon king of Jinghe near Chang 'an made a bet with a fortune teller. He abused his power and violated the dogma, so he should be beheaded. The Jade Emperor appointed Wei Zhi, the minister of the Tang Dynasty, to behead the old dragon king at 3 noon the next day. In order to save his life, King Jinghe came to Li Shimin, Emperor Taizong, the day before the execution, and asked him to stall Wei Zhi the next day to avoid a single shot. Li Shimin felt that Wei Zhi was one of his own and it was easy to solve, so he readily agreed. The next day, Li Shimin announced Wei Zhi to North Korea and left Wei Zhi to play chess with him. Li Shimin's purpose is to trap Wei Zhi in this way, so that he can't get away. Of course, he can't judge many dragons. Unexpectedly, at 3: 30 at noon, Wei Zhi, who was playing Go, dozed off, and Li Shimin didn't care much, while Wei Zheng took advantage of this short nap and had an out-of-body experience, dreaming of beheading the dragon king. King Jinghe, who was beheaded, became angry from embarrassment and resented Li Shimin's breach of his promise, so it has been bothering him. He comes to the Tang Palace every night to make a scene and cry for his life. Li Shimin felt ashamed and sad because he couldn't sleep every night because of the ghost of King Jinghe. In order to find a solution, he had to report the situation to his ministers. General Qin Qiong said: I would like to stand outside the city gate with Wei Chijingde in military uniform. Li Shimin agreed, and it was really nothing that night. But you can't keep them awake every day, can you? Li Shimin couldn't bear the hardships of the two generals. He ordered the court painter to draw the images of Qin Qiong and Wei Chijingde on the canvas and post them at the main entrance of the court. Later, folk learning followed suit, and Qin Qiong and their images were posted on their doors. Slowly, the two generals became the gatekeepers of thousands of families. Among them, Qin Qiong is the scepter holder and Wei Chijingde is the whip holder. In this way, Qin Qiong became a keeper, and still stands today.