Unfortunately in this case common sense trumps political pride: entering Taiwan is considered leaving China, and you’ll thus need a multiple-entry visa to get back to the mainland. (Incidentally, the same applies to Hong Kong and Macau.)
I’m having trouble finding an authoritative source, but this random Chinese visa agent (apparently banned here, replace ‘X’ with c) and this Thorn Tree thread confirm:
double or multiple entry visas would be required if you …
travel between mainland China and Hong Kong or Macau or Taiwan on the
same tour.
Credit:stackoverflow.com‘
5 Mar, 2024
4 Mar, 2024