Trading software is not commercial general software, and no one wants the client to be common on multiple platforms, which is laborious and infringes on other people's technical secrets.
Upstairs, it is even more nonsense to say that Guotai Junan Futures Company's service is not in place. Hang Seng's trading system uses Oracle database platform, which is much superior to Kingstar's Sybase platform in performance. It's just the Sybase database Kingstar started with. If you change the platform, all the programs have to be rewritten, and the workload is extremely huge, so it will not be easily replaced.