Chinese national holiday week: Thai Citizen - apply Chinese Visa in Seoul

Hi, I'm in Seoul until Tue. Oct 3 before fly back to Thailand. Have to fly to China on Mon. Oct 9

Just realized that it will be Chinese national holiday the whole week next week (1-8 Oct) and won't be able to apply entry permit in time in Thailand.

Can I apply a Chinese tourist L on Thu. Sep 28? If yes, How? what are the requirement?

Thanks very much