The donation certificate of Tuantuan Charity can be found on the donation thank-you page. The specific steps are as follows:

1. On the charity project page, click "Single Donation".

2. Click on "Donation Record".

3. On the donation record page, you can view the donation thank-you page and find your own donation certificate.

I hope the above information can help you. If you have any other questions, please feel free to ask me.