Sex, society and suspicious minds

DNA paternity tests are becoming increasingly popular in China as marital ties loosen. Yang Wanli reports.

Since China initiated the opening-up and reform policy in the late 1970s, the country has changed beyond recognition, economically, socially and sexually. While millions of people have been lifted out of poverty as the country has grown to become the world's second-largest economy, the rise in living standards has also resulted in greater sexual freedom and a more tolerant society.

This has been great news for people such as Deng Yajun. Her working day involves dealing with one of the great secrets of the human body: the genes and the unique coding mechanism that distinguishes us from one another, but also provides links between families. Deng conducts DNA tests.