Inventor flush with success

Retired engineer finds cheap and efficient water-saving solution for toilets in the home

Jin Jiugao, a retired engineer with more than 40 years' experience of working in communication technology industries, has embarked on a new career, inventing water-saving devices for toilets.

With no previous knowledge of such matters, he is self-taught and even spent 4,000 yuan ($645) on buying toilets to carry out research at his apartment in Beijing's Chaoyang district.