For saintly but strict surgeon, every cut is from the heart

As a world-class specialist looks to retirement, Zhang Yuchen in Beijing finds out why China needs to find his successor.

For Wu Qingyu, retirement cannot come quickly enough. Although acclaimed as one of the top heart surgeons in the world, the 58-year-old dreams of the day he can spend his days practicing tai chi and traveling.

Others are not so enthusiastic about the prospect of him quitting the operating table - especially the parents of children only he can help.