@Brandon ***********
hi Brandon. I was granted a tourist visa by the London embassy a couple of weeks ago. I'm taking advantage of China's 10-day transit visa so will be arriving BKK from Chengdu.
London embassy asked for my e-tickets.
I sent them the Chengdu to Bangkok ticket but that wasn't enough. They sent a further request for my e-ticket from London to Chengdu.
Once I provided everything, as requested, they issued my tourist visa.
I'm not sure I need the visa for a 2 week trip with a history of regular visits with no extensions but I wanted peace of mind.