THE drainage systems in the city’s old buildings are now being revamped to improve residents’ living environment. The city launched the project three years ago. So far, the drainage systems in more than 430 buildings have been revamped. New manholes were installed and broken pipelines replaced. Residents in many old buildings used to suffer from flooded courtyards after heavy rain, and 91 percent of the problems have been settled after the drainage system upgrade. (Wang Yuanyuan, He Jun) ? | 