Police have pledged to boost efforts to fight child trafficking after an operation that rescued 181 children and arrested 802 suspects.

Chen Shiqu, director of the Ministry of Public Security's anti-human trafficking office, said police have stopped child trafficking from increasing, but the practice is still prominent in some regions.

"We have zero tolerance when it comes to child trafficking and will make the utmost efforts to make sure that every trafficker is caught," Chen said on Friday.