Attendees look at a model of a low-altitude aircraft at the second National Low-Altitude Economy (Suzhou) Industry Innovation Expo in Suzhou, East China's Jiangsu Province on October 20, 2024. China's low-altitude economy exceeded 500 billion yuan ($70.4 billion) in 2023, and it is expected to reach 3.5 trillion yuan in 2035, according to data from CCID Consulting. Photo: VCG