Dhaka, March 30 -- Al Mamun Harun Ur Rashid, Back from Chengdu, China :

Nestled in China's Sichuan Province, the Dujiangyan Irrigation System, constructed over 2,200 years ago, remains the world's only damless water diversion system still in use, and its relevance resonates far beyond China's borders now.

This correspondent recently visited the historic site in Chengdu, capital of Sichuan Province, where ancient stone structures and flowing waters tell a story of ingenuity, sustainability, and harmony with nature.

Locals and experts alike shared insights into how the system, built in 256 BC by Governor Li Bing of the Qin State, not only tamed the volatile Min River but also laid the foundation for prosperity in the Chengdu Plain.

It i...