You can call yourself the police from HK and they will confirm you that.
Then go call the police again and report the theft yourself. Additionally, if you are affected by this you could (or should) consult with a lawyer.
their activity is illegal. Now they are millionaires and destroy many lives
Exactly what part was illegal if they have truly been hacked? Keep in mind that there is a possibility of this being an internal job although that is currently just speculative talk. The people need to keep in mind that what they are proposing for recovery is much better than filing for bankruptcy.