The Wenchuan earthquake has a dual legacy in Yingxiu that has been set in concrete. The devastating 2008 temblor showed a disaster's ability to obliterate buildings and then a building's ability to withstand disaster.
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.