Why did Zhang Zi disappear around xxxHolic 182?

In fact, Zhang Zi died long before she was born on April 1, but Keluo's strong desire kept her alive at the moment before she died. She has been fulfilling people's wishes, and this is the price of reincarnating woody cherry. Please refer to the Chronicle of Wings. But the stagnant time began to turn. After Xiao Lang and Woody Sakura made a choice, Zhang Zi disappeared, but before he disappeared, he saved the store with his last strength. Zhang Zi regards "always satisfying people's wishes" as the price of the rebirth of woody cherry. After disappearing, many human customers forgot her existence. Except April 1 day, all I remember are amazing people-Duomei, mother-in-law, Xiaokui and Xiaoyu, in order to hope that someone can accompany me on April 1 day after I disappear.