Wandequan A Index is viewed from the website of Wande Information Platform, which is mainly used for institutions. The Wonder All-A Index mainly reflects the trend of the whole market (almost all stocks in Shanghai and Shenzhen stock markets except some special stocks, such as those just listed), which is more comprehensive than the Shanghai Stock Exchange Index and Shenzhen Stock Exchange Index.

A-share index refers to the stock index that reflects the trend of A-shares. The A-share indexes used in China include Shanghai Composite Index, Shenzhen Composite Index, Shanghai and Shenzhen 300 Index, CSI 100 Index and Shanghai 180 Index. A stock index is almost synchronized with the changes in the stock market, which is a necessary reference for investors and securities practitioners in China to judge the trend of stock price changes. The weight of the Shanghai Composite Index is the total share capital of listed companies. Because the shares of listed companies in China are divided into tradable shares and non-tradable shares, and their tradable shares are not consistent with the total share capital, the stocks with larger total share capital have a greater impact on the stock index. The Shanghai Composite Index often becomes a tool for large institutions to make the market, which makes the trend of the stock index deviate from the rise and fall of most stocks. The sample of the stock index is all the stocks listed on the Shanghai Stock Exchange, and the newly listed stocks are included in the calculation range of the stock index on the second day of listing.