Nelson Mandela sits outside his Robben Island prison cell window on Nov 28, 2003. Nelson Rolihlahla Mandela is known worldwide for his struggle to overthrow white racism in South Africa for 50 years (1944-1994) and winning the Nobel Peace Prize for his efforts. He spent 27 years in prison from 1962- to 1990, and finally became the first black president of the country, bringing a unified and democratic South Africa. [Photo/CFP]
Geng Jiasheng, 54, a national master technician in the manufacturing industry, is busy working on improvements for a new removable environmental protection toilet, a project he has been devoted to since last year.