原因：微信没有设置添加好友需要进行验证的选项。
设置该选项的方法：
1、首先打开微信程序，进入微信的“我”页面，并选择“设置”按钮。
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2、然后在“设置”页面点击“隐私”选项。
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3、进入“隐私”后，将“加我为朋友时需要验证”右侧的开关按钮打开。
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https://iknow-pic.cdn.bcebos.com/0823dd54564e9258cacdc89f9282d158cdbf4ec1"/>
4、还可以选择“添加我的方式”选项。
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https://iknow-pic.cdn.bcebos.com/ac6eddc451da81cb6908cdbc5c66d016082431d0"/>
5、根据需要将搜索方式下面的“微信号、手机号、QQ号”的开关按钮进行设置即可。
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https://iknow-pic.cdn.bcebos.com/f9dcd100baa1cd114e313c51b712c8fcc3ce2d3f"/>