I think when you look at the demographics of the area, along with the fact that money laundering is known issue, along with the very well known affinity of the Chinese for property as an investment (see Evergrande et al), and yeah it’s not hard to connect those dots.
The unfortunate part is it’s hard to get stats to back it all up because of a failure of governance for decades at all levels of government.
Unpopular opinion - good. It’s a known carcinogen. Add onto that the social issues it can cause and I think it makes some sense to tax it more that other things to bring in those external costs that were being “passed on” to society in the form of healthcare and social services.