A-share futures: A-share stock indexes are traded as futures contracts, such as CSI 300. A shares are ordinary RMB shares. Common shares issued by domestic companies for domestic institutions, organizations or individuals (excluding investors from Hong Kong, Macao and Taiwan) to subscribe and trade in RMB. Symmetry between "B shares" and "H shares". A shares are not physical shares. Electronic recording is adopted, paperless, and the trading system is T+ 1, with the limit of fluctuation (10%). The participating investors are Chinese mainland institutions or individuals. A shares mainly have the following characteristics:

(1) Issue common shares in China that only domestic investors can subscribe for in RMB.

(2) The shares that account for the largest proportion of the company's outstanding shares are also fully circulated, but the A shares of most companies are not the most issued by the company, because most listed companies in China not only issue A shares, but also have non-circulating state-owned shares or state-owned legal person shares.

(3) The stocks that are considered to focus only on the profit distribution right and not on the management right are mainly because people who participate in A-share trading in the stock market are more concerned about the price difference between A-share trading and other rights it represents.