Russians are not Chinese. Singapore continue to import record number of ethnic Chinese people from mainland, Malaysia & surrounding region every year because nobody wants to have kids in Singapore.Old generation of Singaporean government officials probably won't sanction Chinese money. However, newer and younger generation of Singaporean officials could well be persuaded with enough threats and incentives. Russian billionaires were told not to anchor their ships at Singapore and were forced to anchor their ships at Hong Kong for a few months before finding a new destination that is safe for them to anchor.
If there is one country Singapore cannot afford to offend, it is China.
HK is under China's control. Who in their right mind would think it's possible for HK to impose sanctions on China? Let's not make America out to be that powerful, okay?As for sanctioning Hong Kong, that would be very risky move. Hong Kong is very powerful and influential financial center that is very important to many major banks including those in Wall Street and London. Forcing Hong Kong to comply with some US sanctions is possible but Hong Kong is unlikely to do the US bidding especially with China's watching closely. Sanctioning Hong Kong could also disrupt world trades and financial system. It could spend the doom of Dollar's hegemony.
Anyways, I would say this is a pointless argument since we are on a Economics thread, so let's move onto something else.