Each listed security has its own security code, which corresponds to the code one by one. Once the security code is determined, it will not be changed. This is mainly to facilitate computer identification and use.

The securities listed on the Shanghai Stock Exchange adopt 6-digit coding method according to the Securities Coding Implementation Plan of the Shanghai Stock Exchange. The first three digits are different securities, as listed in the following table: 001××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××× 129×××100×××××× convertible bonds; 30 ××××× GEM stocks; 310 ××××× treasury bond futures; 500 ××××××× 550 ××××××× Fund; 600×××A A shares; 700 ××××× rights issue; 710××××× share transfer; 701×××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××× 735 ××××× new fund subscription; 900×××B B shares; 737 ××××× new share placement.

For the securities listed on the Shenzhen Stock Exchange, the securities code of the Shenzhen Stock Exchange shall be followed, and the four-digit compilation method shall be adopted. The first securities variety difference code is shown in the following table: 0×××A A shares; 1××××× corporate bonds, repurchase of government bonds and spot of government bonds; 2 ×××××× B shares and B-share warrants; 3 ×××××× rights issue warrants; 4 ××××× Fund; 5×××××× convertible bonds; 6 ×××××× Treasury bond futures; 7 ××××× options; 8 ×××××× share allotment warrants; 9 ×××××× new share placement.