Charles Li, chief executive of Hong Kong Exchanges and Clearing, said recent turmoil in China's equity market will delay future programs to connect with mainland financial markets.
"Overall, psychologically this is not the time to talk a lot about mutual market access opening, when you have just put out a big fire, you don't want to talk about buying a new sofa and doing a nice window dressing. You want to calm down, figure out how to clear it up and move forward," Mr Li said.
Future connections between China and Hong Kong on derivatives will now take longer amid a debate about the role of stock index futures in the recent equity market turmoil, he added.