HSBC has many departments, each of which has its unique functions and importance. It is difficult to simply say which department is the best, because each department is crucial to the overall operation of the bank. The following are two departments that are considered to be better:

1. HSBC Global Securities Services Department: This department provides investor and securities issuer services for leading large asset management companies, banks, brokers and other institutional clients in the world. This department works closely with the front desk department to provide customers with all-round services.

2. Counter Department: The counter department is one of the best departments in the bank and has the responsibility of directly interacting with customers. After good training, the staff of the counter department can provide efficient, accurate and friendly services, which is very important for maintaining customer relations and the reputation of the bank.

Please note that the above are just two departments that are considered to be better. Choosing the right department also needs to consider personal interests, abilities and career planning.