So the context is basically the HK police launched a "anti-violence hotline" but the population at large think it's basically a report thy neighbor stasi hotline. The police force has come under fire in recent months due to routine use of excessive force on peaceful demonstrators; turning a blind eye to pro government use of violence and collusion with mobsters; as well as politically motivated arrests.
Here's an English article from an Alibaba property:
https://www.scmp.com/news/hong-kong/law-and-crime/article/30...