Link: SWTSX Fund Facts & Fees
But I am not sure if that can be purchased in HK though.
Thanks yes I looked into it as well. VTI can be to my knowledge bought with a US trading account in HK. I wonder if Vanguard HK allows to open one of their recently announced zero commission accounts or if that's only valid for th US. But then again one can also investment in 3140 Vanguards HK listed SP500 ETF.