where can i shop of cheapest and quality clothes in china?thanks

Hi, generally speaking, the wholesale markets in each city of China can you buy the cheapest clothes. But if you want the clothes of very good quality as well, you'd better go to some shopping malls to get some cheap ones when the stores have discounts to the consumers.

how about guang zhou and hai kou??any special there?

I think Guangzhou is the best place to buy the cheap and good quality clothes.

Guang ZHou is a bigger city there? how many hours of take bus from HaiKou, Hanoi going to GuangZHou?if flight?around how much?

Taking bus from Haikou to Guangzhou takes you about 9 hours, so the flight is suggested.
By taking flight, only one hour will be cost from Haikou to Guangzhou without any transfer or complex steps. The ticket price depends on the time and if you buy it early, you probably can get a large discount.