2 questions for a non-Thai resident to apply for a visa for China.

Hello,

- I plan on coming to Chiang Mai in 2 week's time to apply for a 3-month, single entry "F" visa for China. Is this possible, givent that I will be in Thailand as a tourist and not a resident?

- Having dual citizenship, is it possible to enter Thailand using one passport, and then applying for my visa at the Chinese consulate with my other passport? Or can I only apply for the visa using the passport that I used to enter the country and has the entry stamp on it?

Thanks in advance to anyone who can answer these questions!