The police have discovered more than 3,800 cases related to the sale and manufacturing of illegal firearms since August 2016, said the Ministry of Public Security.
A total of 25,000 suspects have been questioned, with 192 firearms workshops dismantled and 265 websites closed, according to the ministry.
Police should intensify the anti-firearm campaign, Li Wei, deputy minister of public security, told attendees of a conference on gun control in Beijing.
Li urged the police to focus on looking for evidence of gun trade and sale on the Internet as well as at logistics companies.
More investigations and control measures are needed to address the inflow of firearms from overseas, Li said.
It is illegal for civilians to possess guns in China and the country has long maintained high pressure on gun crime.