That's quite exactly the opposite of what's true actually.

The Beijing Stock Exchange and Shanghai Stock Exchange are in fact stock markets, and they can buy land legally in many countries (there's no Chinese law prohibiting it at least, local laws in some countries may ban foreigners from buying land). They (their rich, not common people) buy housing in other countries because it's viewed as a better and safer investment (also because buying a home in China is a 70 year lease)