I want to start small business on china products ? how little i can invest ? -

You can invest whatever you want, but I feel you are looking at your business all wrong. It would be better to look at what is needed to start the business and how that fits into your budget. If a good business needs say $10,000 to start, and you only haved $5,000, then your business may not get the initial boost it needs to be done properly. Many businesses make that mistake, they are underfunded at the start and then the money runs out before the business is making enough money to support them. This is why the most important part of opening a business is RESEARCH. Know ahead of time what it will take, both monetarily and effort in order to get this business to a viable self sustaining point. Beyond that is profit.

50000 to 60000 minimumfor a good profit