I sent a message to a WeChat friend, but I sent a red exclamation mark and then showed why I didn't send it.

The message source of 1. wechat has a red exclamation mark because the mobile phone is not connected to the internet or the network is not good, resulting in the information not being sent out.

2. It's because the contact who sent the message has been blacklisted by the other party.

Because the mobile phone is not connected to the internet or the network is not good, the solution steps are as follows:

1. First, open WeChat and chat with each other. As shown in the figure, when WeChat sends a message, a red exclamation mark will appear.

2. At this point, you need to slide down on the mobile phone page, open the mobile data in the upper left corner and wait for a while.

3. After opening the network, click the message as shown in the figure, and the message will be forwarded. Click resend.

4. Finally, you can see that the red exclamation mark disappears and the message is sent.