I’ll describe the problem in English, since my Chinese is not good enough for this — 对不起！
Last year, Postcrossing launched the World Postcard Day, and we managed to talk and collaborate with quite a few postal services on it. I’d like to reach out to China Post, to let them know about this initiative and invite them to join as well… but I haven’t been able to find a useful email contact of someone there.
If any of our Chinese postcrossers could help me look at China Post website and find a good email contact there, I’d be super super grateful! It could be from a marketing person, or someone on the communications or philatelic departments — or even just a general email address I can try.