I daresay China is only interested to the extent that their investments are involved. China will do business with a theocracy - the religious practices of their clientelle doesn’t interest them IMO.
That is most likely true. As you know, Im guessing, the Hardline Muslims who are trying to get control of Arab govts consider the largely atheist, Confusion and Buddhist Chinese to be pagans who are actually even higher on ther hate totem pole than Christians and Jews, so genuine alliances between them and Chinese govt will never happen. And of course, if oil cannot make it out of Arabia to America because the govts in charge, it cant make it to China either and China wont tolerate that for a microsecond.