I am a Korean who is currently in Beijing with Chinese 90 days L visa. I am hoping to go Thailand for my holiday. I need to be back to China after my holiday, but my L visa will expire while i am in Thailand and even my L visa is single entry. is it possible to get F(Business Visa) in BBK without any invitation letter? i would like to apply Chinese F visa through a Visa agency in Thailand. any form of F visa is fine to me.