KUNMING - In the past six years, Li Fengqiang has traveled to more than 16 provinces in China, covering a total distance of more than 30,000 km. And he did it all by himself.

Li is neither an enthusiastic traveler nor a lonely wanderer. He is a policeman from Cangyuan county in Southwest China's Yunnan province.

His mission is simple, but often fraught with difficulties and danger. He has to save people, mostly women and children, who are victims of human trafficking.