(Shaoyang) – On a long journey in search of his lost child, Yang Libing carries a single photograph. It's a faded snapshot of his daughter Yang Ling, who this year turns seven years old.

Family planning agency cadres in the poor mountain town where Yang Libing lived with his wife Cao Zhimei seized their daughter in 2005 and shipped her to an orphanage because they didn't pay a 6,000 yuan penalty – so-called "social support compensation" – for violating China's one-child policy.