Alibaba chose to open a HSBC bank account for many reasons. First, HSBC is an internationally renowned banking institution with a good reputation and professional financial services capabilities. It can provide Alibaba with more secure and efficient fund management services, and can also help Alibaba with cross-border payments and trade settlements.

Second, HSBC has a wide range of branches and networks around the world, which can provide Alibaba with more convenient fund management and cross-border trade services.

Finally, the cooperation between Alibaba and HSBC can also bring more business opportunities and cooperation space for both parties, and promote the common development of both parties.