From The Beijing News (in Chinese), via Press Interpreter, translated by Joel Martinsen:
Several days ago, the police in Longgang, Shenzhen, hung large banners across Yifeng Road in their precinct. The banners read, “Resolutely strike at the Henanese racketeering gang” and “500 yuan reward for anyone who informs on or breaks a case against the Henanese racketeering gang.” This action touched off a minor debate within society. Some people wondered whether this method of attacking criminals showed regional discrimination, but the police said that this action would have a deterrent effect against criminals.
They claim this will strike fear into criminals; expert in Shenzhen calls it regional discrimination.