South China Morning Post:

In Asia, it is common for people to actively avoid houses that were the location of an “unnatural death” because of concerns that the incident will bring bad fortunes to the subsequent residents. “Haunted” flats tend to sell for a significantly lower price than similar places in the surrounding area.

For this reason, property agents in Hong Kong are legally required to disclose an “unnatural death” at a property.

While the job of proving a place is not haunted has existed for a while, a 24-hour live stream from a haunted house tester in Suzhou, in eastern China, attracted public attention to the job.