If you wish to obtain a Chinese visa in another passport, you first need to know whether you need a visa as a citizen of another country in China. With some countries a visa-free regime is established for a stay of 7 to 90 days; Also, citizens of a number of states can enter the Hainan Island for up to 15 days as part of a tourist group; with some countries, China has bilateral agreements, under which, under certain conditions, citizens are not required to issue a visa, etc.

If you need a Chinese visa and you have all the necessary documents to receive it, you can put a visa in another passport, despite the dual citizenship.