Maybe we should contact ZT's parents. Do they live in Guangzhou?
I think that's a terrible idea. If further investigation by competent authorities implicates Zhou then his parents will find out soon enough. Harassing his parents is way out of line and should be rejected as an option if only because Maria made similar threats and nobody should see stooping to her level as acceptable.
When a 17 year old kid knocks a baseball through my window and tries to blame someone else I would go talk to the 17-year kid's parents. I don't see why they would not be contacted for this.