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How to fill in my Changde friend invitation code?

Changde's friend invitation code is as follows:

1. First open the invitation page of Changde friends, and you will see an input box asking for an invitation code.

2. Secondly, in the input box, copy the invitation code provided by Changde friends.

3. Then, paste the copied invitation code into the invitation code input box, and click OK or Submit.

4. Finally, the system will verify whether the invitation code is valid and add it to the friend list of Changde friends. Every Changde friend's invitation code is unique, so you need to ask Changde friends for the correct invitation code.