In Ningxia, Guanglinzi is a well-known brand. From the color, aroma, and taste of cooking, they are all top quality. We have done an experiment using Guanglinzi sesame to fry fish. The oil is clear and has no impurities. If you use other brands of fried fish, a little black residue will remain. Moreover, Guanglinzi flax oil is pressed using ancient methods, so you can consume it with confidence. Thank you