Firefighting equipment on display at the 20th Public Security Exposition Northeast China 2018 in Shenyang, Northeast China’s Liaoning province. The event opened at Shenyang New World Expo on April 19, and will finish on April 21. [Photo/VCG]

Firefighting equipment on display at the expo in Shenyang [Photo/VCG]

Law-enforcement vehicles on display at the expo in Shenyang [Photo/VCG]