When Ningbo has rats, they call the 'ratman'

Zhang Hongguang calls himself "the black cat detective". Who else can catch 50 rats a night?

For years, Zhang has spent almost all his spare time on rats reading books about them, searching for them in Ningbo, Zhejiang, where he lives, and observing their habits and researching methods of catching them.

He estimates he has caught about 20,000 rats in the past two years, earning several thousand yuan a month.