i hope to fly to Shanghai on the Virgin Atlantic, on the 1st of December

stay in one of your hotels as a visitor and leave on the 6th of December, so just have the five days in SH.
Please could you tell me , for the short stay do i require any thing else but the 144 day visa,s.
Please could i ask were i can obtain the visa, maybe it could be at heathrow airport or maybe fill in the required information while i am in flight to your country