On Dec 12, 2013, a police intern found a lost boy on a bus and sent him to the police station. Later he got in contact with his parents, who then retrieved their son.[Photo/CFP]

Editor's note: A police officer's work is never ending and never easy. From witnessing gruesome scenes to burning midnight oil solving complex cases, police work is one of the most challenging in the world. It becomes tougher if they have to deal with a huge population.

Chongqing with a population of around 30 million is the largest municipality in China. Yubeilu police station in the municipality deals with numerous cases every day. According to the Chongqing Evening News, the station handled 76,650 cases in the past three years.