As a large-scale market in the world, Hong Kong stocks also have index funds. Generally speaking, index funds track the Hang Seng Index. For example, Guangfa Hong Kong Stock Connect Hang Seng A Index Fund tracks the Hang Seng Index.
Of course, there are other Hang Seng indices in Hong Kong stocks, such as Hang Seng China 25 Index, CITIC S&P Small Cap Index and Hang Seng Composite Small Cap Index. Many funds also track these indexes.