Chengdu Tianfu International Airport is my country's largest civil transportation hub airport project planned and constructed during the "National 13th Five-Year Plan" period. It is positioned as a national-level international aviation hub and the highest-level airport in the Silk Road Economic Belt. The airport uses Taining siphon roof rainwater drainage collection system, which is a national key project that our company participated in the construction. The first phase of the terminal building is about 609,000 square meters, with a roof catchment area of 320,000 square meters, 339 siphon systems, about 1,000 rainwater buckets, and a total pipeline length of up to 30,000 meters. After completion, Chengdu will become the third city in China with dual international airports after Beijing and Shanghai, and Taining’s siphon roof rainwater drainage collection system will also provide protection for the roof drainage safety of this "sun bird"