Mobile QQ sees a friend's message and wants to use the friend ID, but the ID has special symbols and avatars. If you want to copy it, you need to enter the other person's message and copy it.
Open the mobile phone qq and enter the "Message" page
Click "Dynamic" in the lower right corner
Select "social updates" at this time
Find "talk" at the top center and enter
Find the "Say" you want to copy the ID
Click your friend's "avatar" to enter their homepage
Long press your friend's ID, and the word "Copy" appears. Click Copy