For the first time in 60 years, the police officers in Shanghai will be armed with handguns according to a report at china.org.cn. The report states the officers will carry a 9mm revolver that is equipped with three safety devices and can fire rubber bullets in addition to conventional ammunition.
The revolvers in question are likely the 9mm police revolvers identified here by world.guns.ru. The handguns are a double action revolver with a swing out cylinder that are chambered for a low power 9mm round. According to the information, the rounds are ballistically similar to the .38 S&W (not Special). Muzzle velocity is listed as 720 fps with an unknown weight bullet.
The revolvers are equipped with a manual safety on the left side of the frame.
These guns are possibly the Norinco NP-216.