As I didn't find a reception report submit section on the CRI website, I just sent them an e-mail and it worked and there was even a little conversation including some mild argument about whether I reported correct times for my receptions.
I just used a reception report form that I found online.
This is the envelope that my CRI QSL card came in.
In fact, the envelope contained not just a requested QSL card but a nice little bundle of other goodies.
A QSL card, a CRI sticker (I asked for one too) and three curious things like paper appliques figures or something. Must be traditional Chinese, nice too.
CRI sticker.
The CRI sticker reverse.
A QSL card from China Radio International.
It features China's rare endangered animals which are in this case the Saiga, I think.