Board lot of 100 shares at roughly HKD20 per share. So can pretty much start investing at around HKD2k.
This is a really low entry barrier!
Yes yes, I know people will talk about liquidity, withholding tax etc, but for anyone wanting to start out on ETFs and don't have lots of money to invest or set up a brokerage account with IB, Saxo, etc, I think 3140.hk is something to seriously consider.