China custome allows personal effects valued no more than 2000RMB. Put the fish oil and calcium in your lugguage to be consigned. If the have clear outpacking and you don't take too much, that will not be a problem when you pass through the custom. Here is a experience to share: there is some one take 8 bottle fish oil and 8 bottles of Calcium and some other healthcare products. The custom staff asked about those stuff and the passenger asked he bought for his old gramdma, parents and so on. So, if you are lucky, you may not get through it very easy. If you take too much, the custom rate about these kind of product is 10 percent.