Li Shimin is the emperor of Wei Zi.

Li Shimin didn't kneel down to Guanyin because its predecessor was too high. Its predecessor was the "Emperor Wei Zi of the Arctic", so Guanyin couldn't accept his bow down, so Li Shimin couldn't kneel down to Guanyin Bodhisattva.

According to historical records, Li Shimin was once frightened by the Dragon King, which made his soul as stiff as an out-of-body experience, and he went to hell. When he got there, he was not only fine, but also treated with courtesy. When he got there, not only someone came to meet him, but also worshipped Li Shimin. Even the Yan should respect Li Shimin, which shows how miserable Li Shimin was in his previous life, and the judge tried to please him.

Li Shimin's previous life was Emperor Wei Zi of the Arctic, and Emperor Wei Zi of the Arctic was an emperor. He is a star-studded character. His position and rights in the whole three realms are very high, and his range is also very wide. His jurisdiction ranges from the universe to the world, and he is in charge of the gods in the sky, all under his control. Therefore, his ability is magical and has no boundaries, so Li Shimin will not bow down when he sees the Bodhisattva.

We can see from Yan and the judge's attitude towards the underworld how powerful their previous lives were, and how powerful their previous lives were towards Guanyin, Yan and the judge. In addition, in the face of Guanyin, others will bow down, but he doesn't, which shows how noble the position of the Arctic Han Emperor was in his last life.