Xia Zi in A Chinese Odyssey: How did she become a mortal?

Whether Xia Zi is a fairy is related to whether she has a bracelet or not. When you watched the second Xia Zi War between the Four Heavenly Kings and Erlang God, when Xia Zi shook the bracelet in his hand, his opponent became fascinated, indicating that the bracelet was not extraordinary. Later, when Xia Zi fought with Niu, Niu seemed to know the function of the bracelet, so he knocked it off and Xia Zi was arrested. On the seventh day, Spider Spirit brought the bracelet to the Supreme Treasure, suggesting that Xia Zi would be in trouble without the bracelet and asked the Supreme Treasure to save her. After the Monkey King cast a spell, he went back to his side to save Xia Zi and others. When Xia Zi told the Monkey King that he was no longer a fairy (note that Xia Zi had no magic at this time, and could not make any resistance to the cow), the Monkey King dropped the bracelet, and Xia Zi picked it up and said that the Monkey King had cheated her, and then flew to the Monkey King. That's right, because the bracelet was in her hand again. With magic, she could fly.