Many police commanders will compromise and accept civilians who have done well in shooting competitions held for hunters. The new affluence in China has created a lot more people who can afford the hassle and expense of getting a rifle permit and access to a hunting area. These tend to be older guys who already have a good job.
Typically about ten percent of SWAT personnel are snipers or EOD. Police are expanding their SWAT strength on the orders of the central government, which is apparently alarmed at the growing unrest. People are increasingly demonstrating, sometimes violently, against corruption and other forms of government abuse. There have not been many bombs or guns involved in these incidents but criminals have a black market where pistols and explosives can be obtained. The weapons are often bought from corrupt police or military personnel. Explosives are easier to get because of all the construction and mining going on and weak controls on all the commercial explosives used.