I want to ask you what you need an 800-hour certificate for. If you are reviewing APS, you don't have to write your own 400-hour self-study certificate. If you want to apply for a school, you can only apply for 800 hours of language classes. You might as well go to Beijing to find a Telford class after graduation. It's best to get in, but a score of 3333 is much better than 800.
And it doesn't cost 8000 yuan at all. I went to the Rhine Spring in Beijing and took classes in Lao Xu. The house I rent is 800 yuan a month, and the tuition is 2300 yuan (it seems) for 230 hours. It is cheaper to apply for B2 or intermediate level. You search Rhine spring. But if there is no solid foundation, it is useless to go.
My advice to you is the basis of studying A 1 in New Oriental. After learning the basic grammar and having the ability of self-study, start memorizing words by yourself. When you think it's almost enough, find a summer vacation and go to Beijing or Shanghai to take a test class at Telford. Then I was in Calder Ford. It's best to pass, but take a 3333. With it, many schools can register. Visa, APS is universal.