Gold bars, cruises, Dior beauty services and Rosewood Hong Kong vouchers are just some of the incentives Hong Kong’s major lenders are offering in hopes of capturing wealthy clients, as visitors from mainland China descend on the city during the golden week holiday starting on Friday.

HSBC, Standard Chartered and Bank of China (Hong Kong) – the city’s three biggest banks – Citigroup, DBS Hong Kong, ICBC Asia, Bank of East Asia and Hang Seng Bank have all extended the hours of certain branches on...