Why is the common name of Pig Bajie Zhu Gang? Who gave it to him?

It is said that the Monkey King caught Pig Bajie in Gaolaozhuang. Boasting for a long time, Pig Bajie announced himself: I was reincarnated by mistake because of guilt, and my common name is Pig Bajie Zhu Gang. This is the first time that Pig Bajie called himself a common name, and it is also the last time. After that, Zhu Bajie joined the pilgrimage team. Tang Priest called him Bajie, Wukong called him a fool, Friar Sand called him the second brother, former immortal colleagues called him Marshal Tian Peng, and mortals called him a monster. No one has ever called him the name pig. Then why is he called a pig and who named him? First of all, tell me who gave Pig Bajie's surname. Guanyin Bodhisattva was instructed by the Tathagata to form a pilgrimage group, and was stopped by Pig Bajie for dinner at Zhanyun Cave in Fuling Mountain. After asking the reason, Guanyin said that there is no future if there is a future. You broke the law in the upper bound. Now you don't change your mind, hurting people and committing crimes. What can you do in the future? Bajie said, the future! If you teach me to ride the wind! Might as well catch a pedestrian and eat his mother! Bodhisattva said that if people have good thoughts, the sky will follow. There is food in the world, so why eat people? Hearing this, Pig felt like a dream, and said to the Bodhisattva, I want to clear my name, but I was condemned by heaven and asked for nothing. Guanyin said that I was ordered by the Tathagata to form a Buddhist sutra group. You can be a disciple of Buddhist scriptures, go to the West for righteousness, and punish you from the disaster. Bajie readily promised. So the Bodhisattva became sworn to him, saying that his surname was pig and giving him a dharma name called pig Wuneng. From then on, Zhu Wu was able to fast, break the five meats and three evils, and wait for the scriptures. Why did Pig Bajie put this sentence with Guanyin at this time? He just asked Guanyin that I had offended the Jade Emperor. Can you solve it for me? Get out of the way Guanyin said I can't, just come. As long as you follow the Tang Priest to learn the scriptures, as long as you go to the Western Heaven, the Tathagata can plead with the Jade Emperor to save your sin. Bajie then agreed to join the Buddhist team and convert to Buddhism. But after Guanyin left, the Jade Emperor, who paid close attention to the development of Bajie, sent someone to tell him that Guanyin's words didn't count. Only the jade emperor can forgive your crimes in heaven, and no one else can. Don't think that I can't cure you if you become a monk. Tathagata is still under the control of the Jade Emperor. But the Jade Emperor also acquiesced in Bajie's participation in the pilgrimage group, or Bajie's participation in the pilgrimage group was greeted by the Tathagata. But the Jade Emperor also named Bajie a pig. You did a good job, Bajie. You are Marshal Tian Peng. You can come back later. If it's not done well, it's a pig to be slaughtered If you are unhappy that day, you will be cut off and put on the altar as a sacrifice.