My podcast does not appear in CHINA podcast store

I'm afraid I can't help you: it appears in the UK Store but obviously I can't check the China Store. Given that the language is correctly given in the 'language' tag one would have expected it to be the other way round. In general, if one is told that a podcast isn't available in your own country's Store it isn't available anywhere, but as we see that's not the case here. Is the subject matter such that it might faul foul of the Chinese censors? I can only suggest you contact Support, though I don't know how much help they will be able to give. Go to https://itunespartner.apple.com/en/podcasts/overview and click the 'Contact Us' link at the bottom of the page.