UK Undergraduate degree in China
Your Question如果在国内读完本科，想申请英国较好的大学，但是条件可能不是很够那可不可以去英国再申请一个本科读这样可行吗？
If I have finished my Undergraduate degree in China and I want to go to a good UK university but I know my qualification is not good enough, can I go to the UK to study another undergraduate degree?
The Answer
Yes, you can if you can afford it. To study in a good university you will need to start from Year 1 (so it will take 3 years to get the Bachelor degree). However, it will make your visa application more difficult because the British visa officer will wonder why you plan to spend so much money to get another Bachelor degree.
A better idea may be to study for a one year postgraduate Diploma followed by a one year Masters degree. Many Masters degrees allow students who do not have good grades to first study for a Diploma in the subject and if they prove they are good enough they are allowed to then do the MSc/MA
This way you can be accepted by many top universities. Not all Masters degrees in Britain offer this route but many do, especially in Business, Law, Economics and Computer Science. If you let me know what major you have studied in China and what major you want to study in Britain I can tell you more about this way.