If the server is in China, the network speed will naturally swish fast.
If the server is in America, you can't open it at all.
If the server is in Hong Kong, it is normal to open it slowly. As for the reasons, for example, because the bandwidth of domestic connection with foreign countries is limited, some have to filter out bad information through domain name analysis, and some have long signal loss and server problems.
I looked it up for you. The server of Hang Seng Bank is in Hong Kong, and the opening speed is certain. Please pay attention to item 4 above.