(250523) -- CHONGQING, May 23, 2025 (Xinhua) -- A large emergency rescue drone is pictured at the 7th Western China International Fair for Investment and Trade in southwest China's Chongqing Municipality, May 22, 2025. The 7th Western China International Fair for Investment and Trade kicked off in southwest China's Chongqing Municipality on Thursday. Various products related to low-altitude economy attracted the attention of visitors at the fair. (Xinhua/Chen Cheng)