An FH-909 unmanned helicopter is displayed during the 13th China (Mianyang) Science and Technology City International High-Tech Expo in Mianyang, southwest China's Sichuan Province, Sept. 27, 2025. The expo opened here on Friday and will last until Sept. 30, with a core exhibition area of 32,000 square meters for science and technology which focuses on electronic manufacturing technology, new display technology, AI technology and low-altitude economy. (Xinhua/Xue Chen)

People visit the 13th China (Mianyang) Science and Technology City International High-Tech Expo in Mianyang, southwest China's Sichuan Province, Sept. 27, 2025. The expo opened here on Friday and will last until Sept. 30, with a core exhibition area of 32,000 square meters for science and technology which focuses on electronic manufacturing technology, new display technology, AI technology and low-altitude economy. (Xinhua/Xue Chen)

A boy watches helicopter models during the 13th China (Mianyang) Science and Technology City International High-Tech Expo in Mianyang, southwest China's Sichuan Province, Sept. 27, 2025. The expo opened here on Friday and will last until Sept. 30, with a core exhibition area of 32,000 square meters for science and technology which focuses on electronic manufacturing technology, new display technology, AI technology and low-altitude economy. (Xinhua/Xue Chen)

A boy learns about a future-concept vehicle during the 13th China (Mianyang) Science and Technology City International High-Tech Expo in Mianyang, southwest China's Sichuan Province, Sept. 27, 2025. The expo opened here on Friday and will last until Sept. 30, with a core exhibition area of 32,000 square meters for science and technology which focuses on electronic manufacturing technology, new display technology, AI technology and low-altitude economy. (Xinhua/Xue Chen)

Children learn about a future-concept vehicle during the 13th China (Mianyang) Science and Technology City International High-Tech Expo in Mianyang, southwest China's Sichuan Province, Sept. 27, 2025. The expo opened here on Friday and will last until Sept. 30, with a core exhibition area of 32,000 square meters for science and technology which focuses on electronic manufacturing technology, new display technology, AI technology and low-altitude economy. (Xinhua/Xue Chen)

People visit the 13th China (Mianyang) Science and Technology City International High-Tech Expo in Mianyang, southwest China's Sichuan Province, Sept. 27, 2025. The expo opened here on Friday and will last until Sept. 30, with a core exhibition area of 32,000 square meters for science and technology which focuses on electronic manufacturing technology, new display technology, AI technology and low-altitude economy. (Xinhua/Xue Chen)

A robot demonstrates its capability to autonomously tidy up a table during the 13th China (Mianyang) Science and Technology City International High-Tech Expo in Mianyang, southwest China's Sichuan Province, Sept. 27, 2025. The expo opened here on Friday and will last until Sept. 30, with a core exhibition area of 32,000 square meters for science and technology which focuses on electronic manufacturing technology, new display technology, AI technology and low-altitude economy. (Xinhua/Xue Chen)

A man takes photos of a survey UAV during the 13th China (Mianyang) Science and Technology City International High-Tech Expo in Mianyang, southwest China's Sichuan Province, Sept. 27, 2025. The expo opened here on Friday and will last until Sept. 30, with a core exhibition area of 32,000 square meters for science and technology which focuses on electronic manufacturing technology, new display technology, AI technology and low-altitude economy. (Xinhua/Xue Chen)