According to the Notice on Matters Related to Trading Stocks and Depositary Receipts in science and technology innovation board, if the issuer has not yet made a profit, the special logo of its stocks or depositary receipts will be "U", and if the issuer makes a profit for the first time, the special logo will be cancelled. A stock with a "W" indicates that the issuer has differentiated voting rights. If there is no differentiated voting rights after listing, the special logo will be cancelled.