China's Jiang Tingting and Jiang Wenwen perform in the synchronised swimming duet free final during the World Swimming Championships at the Sant Jordi arena in Barcelona, July 25, 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.
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