OK, who do you consider top tier investment bank in Asia? Goldmans, MS, HSBC, JPM - yes. UBS, Citi, Credit Suisse, BAML - OK. DB, SCB, Barclays, ANZ - all reducing scale in Asia, so no. and then the more niche players Macq, BNP. The Japanese banks are making a big splash on the loans side but not really considered iBanks. The Chinese banks are aggressive but little international presence.
Only a few of those names would hire from local unis - look for the ones with large HK client base. If the top tier will not hire you then try the lower tiers - eg apply to BNP and hope to get a French guy to interview you and surprise him with your French language. That probably means more than marks. Network - join rugby clubs. If you get a CPA, then forget about joining a front office role down the line. Those days are gone. You might get a Compliance role or something in financial control.
Your better off getting an MBA from top school (like HKUST/Kellog), getting a MSc in Financial Modelling from Monash and CFA. Legal degrees are quite handy too.