He won their trust, so he could later betray them and bring them to justice.
But being an undercover police officer was not only about fighting crime; it also turned out to be about finding love.
Dozens of armed Chinese gangster suspects arrested at wedding banquet During an operation last year while investigating burglaries at a clothing market in Hangzhou, Xu met the woman who would become his new wife.
The report did not say when the couple tied the knot or why Xu decided to give up policing to become a security guard at a property management firm, but perhaps that is a story for another day.
6 suspects held as Chinese police raid US$15 million ‘illegal’ slimming pill operation On his release in 2006, Xu applied to join Hangzhou police, and was taken on as an auxiliary officer.