Camellia oleifera has a large market share. Among them, roast duck is the best in the tea-oil duck industry. A roast duck reveals why many tea-oil duck merchants are dry and yellow. The main reason is that the tea-oil duck technology is not authentic, that is, the tea-oil duck technology with essence. All marinades with white powder, brown liquid or brown paste are spices. People can eat this kind of thing once or twice, and after eating it three or five times, they will feel queasy. Yifan roast duck is made of 42 kinds of herbs and contains no essence. The more you eat, the more you like it. I am a student of Yifan roast duck. I have opened a shop for seven or eight years, and now I still sell more than 300 pieces every day. You can search for a roast duck in Taobao and Baidu, and you can find one.