The adjustment methods of cultural futures index are as follows: At present, domestic stock index futures contracts mainly include Shanghai and Shenzhen 300 Index, Shanghai 50 Index and Huaxia 500 Index. The Shanghai and Shenzhen 300 Index is a sample of 300 A shares selected from the Shanghai and Shenzhen stock markets, including Shanghai 179 and Shenzhen 1. The selection criteria are large-scale and liquid stocks, and the stock index futures code is IF.