Because you wrote Chinese, the AI (especially Apple's) automatically "corrected" it to what the AI thinks it should be!
https://baike.baidu.com/item/%E9%98%BF%E5%87%A1%E6%8F%90%E7%9A%84%E6%95%85%E4%BA%8B/361532
I encounter many such "corrections" when using "手寫版" (the only way I know how to "type" Chinese).