Caterine Ibarguen of Colombia celebrates winning the gold during the women's triple jump final at the IAAF World Athletics Championships at the Luzhniki stadium in Moscow, Aug 15, 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.