I used to work in Hunan province about 12yrs ago, never been to Rucheng though. Given the size and location I think they would be surprised to see a foreigner there.
Nearest cache to Rucheng appears to be 250km away at GC1FHAM, which seems to have been misplaced from Mexico! ❔ Next nearest is at Guangzhou...
I wonder how the destination was chosen?