Many questions which you really need expert advice on. We are Diabetics not experts who are fully up to date with Immigration Rules and Policies of the NHS regarding Foreign (Non EU) Students.
Here is a link to a website with good advice for all Foreign students regarding the things you should do, and need to know.
http://www.foreignstudents.com/our-guides/health/#c-137
Extract:
Non-EEA nationals
If you are not from an EEA country, you still qualify for full NHS treatment if you meet the following conditions:
• If your course is six months or more, you qualify for full NHS treatment. In England and Wales, if you have a husband, wife or children accompanying you as your dependents (not just as your visitors), they can also receive treatment. However, the children must be up to the age of 16 (or 19, if in full-time education).
• If your course is less than six months and you are studying in Scotland, you can receive full NHS treatment.
• If your course is less than six months long and you are studying in England and Wales, you can receive full NHS hospital treatment if the UK government is providing at least 35 per cent of the funding for your course. You will need to provide evidence of this. However, you might not be eligible for GP treatment.
When you pass through immigration, you may have to produce health certificates proving you have had certain inoculations and vaccinations. These can include diphtheria, tetanus, polio, meningitis, measles, mumps and rubella. If you come from a tuberculosis (TB) high-risk area, you may also have to produce a chest x-ray.
Check with the British Embassy or High Commission in your home country to find out what is required.
The UK has reciprocal health care agreements with some countries. The list of countries sometimes changes, so check with your health authorities to see if your country is on the list. I do not think China is on the list ?
Register with your local GP
If you qualify for full NHS treatment, you should register with your local General Practitioner (GP) as soon as you arrive in the UK. It usually takes a while for your application to be processed, so it’s best not to leave it until you get ill. A GP is a doctor who can treat most illnesses, and they should be your first point of call for any non-life-threatening health problems and illnesses. They usually operate in a surgery or health centre, and many university campuses have their own health centres for students. You can find your local surgery or health centre here
Surgeries and health centres can also provide services like vaccinations, women’s health clinics, services for parents of young children, family planning, contraception and sexual health.
When you register, you will need a passport, evidence that you are a student (for example, a student card) and proof of your UK address (for example, accommodation contract). Once you have been registered, you will be put on a GP’s list if you prefer. Most surgeries have female GPs, so you can ask to be put on a female GP’s list. If a doctor accepts you as a patient, you will be sent a medical card via post with your NHS number. If a doctor does not accept you as a patient, try elsewhere or contact the local Primary Care Trust (in England or Scotland), the Central Services Agency (in Northern Ireland) or your Local Health Board (in Wales).
This is just a guide to help you. Please check with the apropriate authorities both in China and here in the UK.