Xiaoqing was accepted as a disciple of Guanyin Bodhisattva for the following three reasons: First, Xiaoqing's thousand-year practice is really rare; Second, Xiaoqing and White Snake are sisters, and Xiaoqing has always been affectionate and righteous to White Snake; Third, Xiaoqing's master is an Antarctic fairy.

First, Xiaoqing's Millennium practice is really hard to get. In "The Legend of the New White Snake", Guanyin Bodhisattva said that Xiaoqing's Millennium practice was really not easy when she accepted Xiaoqing as a disciple, so she hoped Xiaoqing could turn over a new leaf and come to her seat to practice with great concentration. Although there is a slight gap between Xiaoqing and Bai Niangzi, both Xiaoqing and Bai Niangzi are fairies with the highest lines in the legend of the new White Niangzi. Guanyin Bodhisattva doesn't want Xiaoqing, who owns the Millennium Line, to be taken away by Fahai, so she will take the initiative to accept Xiaoqing as an apprentice.

Second, Xiaoqing and White Snake are sisters, and Xiaoqing has always been affectionate and righteous to White Snake. Secondly, Xiaoqing has always been appreciated by Guanyin Bodhisattva, so Guanyin Bodhisattva will appear at the most appropriate time and accept Xiaoqing as an apprentice. The White Snake is a reincarnation of Zixing, and it is normal to be taken care of by Guanyin Bodhisattva. As an assistant of the White Snake, Xiaoqing can naturally get the attention of Guanyin Bodhisattva. Although Xiaoqing is a little unruly and willful, she is kind in nature and never harms the world with her own witchcraft. Xiaoqing has actually done better than Fahai in this respect. These Guanyin Bodhisattvas are all in the eye, so Guanyin Bodhisattva is also willing to give Xiaoqing a chance to embark on the right path.

Third, Xiaoqing's master is an Antarctic fairy. Finally, Guanyin Bodhisattva will accept Xiaoqing as an apprentice. I think it is inseparable from master Xiaoqing. Xiaoqing herself once told Bai Niangzi that his master was an Antarctic fairy, and when Bai Niangzi went to steal the Ganoderma lucidum of the Antarctic fairy, it was also an Antarctic fairy who helped him. So the Antarctic fairy and Guanyin Bodhisattva have been secretly watching the White Snake and Xiaoqing. The Antarctic fairy can teach Xiaoqing magic, but it can't change Xiaoqing's mind, so it is likely that the Antarctic fairy made Guanyin Bodhisattva accept Xiaoqing.