There will come a time when the Tiongs bring negligible economic benefits (investments, tourist spending etc), but a whole lot of societal, security and geopolitical problems.
You will need to rethink your 30-day visa-free policy for them. And you might even have to investigate the Tiongs (or newly minted Sinkie citizens) who have been here for some time.
Don't wait too long to take action. Otherwise there will be dire consequences.
P.S: Shut down the Confucius Institute and the China Cultural Centre at Queen Street.