I blocked a person from seeing when I sent a circle of friends, and later I wanted this person to see my circle of friends. ...

This cannot be modified. The only simple and non-repetitive way for others to see it is to send another one and set it as "only he can see it".

Log in to WeChat on your mobile phone first. Enter the discovery mark below. Then enter the circle of friends and click on the small camera logo in the upper right corner. Then choose the way you want to send friends. After entering, find someone who can watch below and click enter.

Redistribute this circle of friends so that only they can see it.

The third line at the top of the address book page below has a label setting. Set him as a tag alone. When you send a circle of friends, only he can be seen. If others need to see them, put them in the label.

You choose what he can see, he can only see this one, and the others are still blocked. Take Apple's iphoneX as an example: first, open WeChat and enter the publishing interface of friends circle. Then click the camera button on the upper right to publish graphic dynamics, and long press to publish plain text dynamics.