A securities company has and can only open one account. However, in the actual securities trading market, if investors choose to open ordinary accounts, the principle of one person and three households will be implemented. In other words, investors can choose to open ordinary accounts in three securities companies. After that, investors will not be able to open ordinary accounts.
Generally speaking, the Shanghai Stock Exchange has at most 3 shareholder accounts and the Shenzhen Stock Exchange has at most 20 shareholder accounts.