Urban management officers took to the internet to broadcast themselves going about the dark streets of Zhengzhou, Henan province, to "ensure a quiet environment" for students taking the national college entrance exam.

The live webcast was accompanied by text describing what the officers, known as chengguan, were doing and where they were going.

The idea was to show a "transparent law enforcement process to the public", according to the urban management bureau of Zhengzhou's Zhongyuan district.