How do WeChat friends send numbers with blue boxes?

This comes with the ios system, and Apple phones will have it.

Wechat circle of friends:

WeChat circle of friends refers to a social function on Tencent WeChat, which was launched on April 20, 2002 when the WeChat version 4.0 was updated on KLOC-0/9. Users can post words and pictures through friends circle, and share articles or music to friends circle through other software.

Users can "comment" or "like" friends' new photos, and users can only view the comments or likes of the same friend.