Are you looking for knives for personal use, or do you intend to buy them for re-sale in China.
Cold Steel and Buck are very easy to find in the United States, and many retailers will ship internationally. As for the laws governing imports into China, that is something you will know more about than any of us.
Aren't some Buck and Cold Steel knives actually made in China? Seems it would be easier to purchase them right there, unless the factories that make them are not set up to do business that way.
Hope I understood you right, and that this helps.