Photo taken on Nov. 5, 2018 shows a full-size model of the core module of China's space station Tianhe exhibited at the 12th China International Aviation and Aerospace Exhibition (Airshow China) in Zhuhai, south China's Guangdong Province. A full-size model of the core module of China's space station Tianhe made its debut at Airshow China, which opened Tuesday in Zhuhai.(Xinhua/Liang Xu)