The sardine is a fish belonging to the herring family and the herring genus, with an elongated body shape and a length of about 15-30 centimeters. It is mainly found in the East Sea, Yellow Sea and Bohai Sea in China. Sardine mainly feeds on plankton, and its production is found in all the coastal waters of China, but the Yellow Sea and Bohai Sea are more abundant. In China's fishing grounds, Qingdao, Yantai, Weihai and other places in Shandong are the main fishing grounds. in the spring to the middle of May, sardines will swim to the near shore in groups, especially from the north of Shandong to the coast of Liaonan is the most intensive. in the middle and late May, most of the sardines enter the Bohai Sea, and only a small portion of the sardines continue to the south into the Yellow Sea. To summarize, sardines are mainly produced in the East China Sea, Yellow Sea and Bohai Sea, of which the Yellow Sea and Bohai Sea are more abundant.