Spain's Prince Felipe (C) and Princess Letizia (R) greet Japanese Princess Takamado at the opening ceremony of the 125th International Olympic Committee (IOC) Session at the Teatro Colon opera house in Buenos Aires September 6, 2013. [Photo/Agencies]
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.