A securities account is different from a bank card. There is a charge for using bank cards in different places, but no charge for securities accounts!
After you download and install the software in Shanghai, you can log in for trading with the same account and password, without any influence or charge. The only bad thing is that the bank card associated with your account will be charged off-site use fees for withdrawing money and saving money in Shanghai. If the landlord is in Shanghai for a long time, it is suggested to cancel the original connection and use the local bank card in Shanghai to do related business to avoid charging fees.