Illegal financial business activities include: fund-raising targeting not specific objects without legal approval, or other activities that the People’s Bank of China identified as illegal.
The "Officials" tend to rank anything as beeing illegal unless they get their own fair cut of the cake.
I'm doubting that on the investment side china even has that much of an impact. Mining yes, investments by people numbers no.
This news ranking in between "Russia banns Bitcoin" and "Russia didn't bann Bitcoin" chenanigans.