Mini Program setData failure

A novice just started to learn from Mini Program, using the framework built by wepy, but encountered some problems in setData, as shown in the following figure

at debugger, you can see that the page is changed to 23, but after skipping this line of debugging, it becomes the initial value of 13. Excuse me, what is the situation?

Mar.08,2021

if you are using wepy, you can use the dot operator directly, just like vue this.text = '23'

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