This article is a fairly complete guide to get a Chinese VISA in Hong Kong or do a VISA run (in the case you have a multi-entry VISA and need to leave China every thirty or sixty days) spending the smallest possible amount of money.
You’ll find the following information:
- Do I need a VISA for visiting Hong Kong?
- Where can I get a Chinese VISA in Hong Kong and how much does it cost?
- How to travel from China to Hong Kong (the cheapest way).
For more general information I suggest you to read Chinese VISA application: a complete guide.