Address of Bangkok Immigration Bureau

The Embassy of China in Thailand is located in Bangkok, with consulates general in Songkhla and Chiang Mai. Where to apply for a visa depends on whether your girlfriend is close or not, and whether it is convenient or not.

For visa requirements, please go to the website of the Embassy of China in Thailand, home page-> Consular service->; Visa and entry permit, including visa description, visa fee and notice of required materials, need to be understood. It's easier to get a visa to China. You can apply for a visa without an invitation letter, and you can also travel individually. You can also send her an invitation in your own name, but it may be troublesome to prove the relationship.

If there is a route, check the flight yourself. I don't know where you are going. AirAsia is generally cheaper.

I hope it helps.