You can try Qianlong Stock Analysis System, which can analyze A, B and H shares. Its Hong Kong stocks are delayed for one hour, and it is still the "China Financial Investment Quotation System".
Besides,
www.hkex.com.hk
On the website of the Hong Kong Stock Exchange, there are even quotes from Hong Kong, as well as historical data and information. You can have a look.
Straight flush has free market software, you can watch A, B, H, futures and foreign exchange.
H delay 1 hour.