How does WeChat see if the other party blacked you out?

You can transfer money to the other party. If prompted, please confirm whether your relationship with his (her) friend is normal, which means that you have been blacked out by the other party. Let me demonstrate the detailed operation steps below? (ゝω)

(Mobile phone model: Yijia 1 1, software and version number: WeChat 8.0.3 1)

1, open WeChat, and click Friends to enter.

2. Click+,and then click Transfer.

3. If the prompt "Please confirm whether your friend relationship with him or her is normal" pops up, it means that the other party has blacked you out.