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  Colombo is the capital of Sri Lanka, with a resident population of about 650000. In recent years, due to the aging of water supply network and the lack of management measures, the leakage rate has been maintained at a high level of about 40% for a long time. In order to alleviate the current water supply situation, the Colombo Water Authority officially signed a strategic cooperation agreement with Shanghai Kailiu in 2016, and officially launched the zoning metering and pipe network facility reconstruction project. The project mainly includes the primary district measurement in Colombo and the replacement of trade settlement statements of some industrial and commercial users. At the same time, the background leakage of pipe network is gradually reduced by means of regional pressure reduction.