Competitors prepare their aircraft model during the final of the China International Aircraft Design Challenge in Fuxin, northeast China's Liaoning Province, Oct. 13, 2021. The final of 2021 China International Aircraft Design Challenge kicked off here on Wednesday. More than 1700 competitors from about 70 universities attended the final. [Photo by Yang Qing/Xinhua]

Teams participate in the opening ceremony of the China International Aircraft Design Challenge final in Fuxin, northeast China's Liaoning Province, Oct. 13, 2021. The final of 2021 China International Aircraft Design Challenge kicked off here on Wednesday. More than 1700 competitors from about 70 universities attended the final. [Photo by Yang Qing/Xinhua]

Performing teams pose for a group photo during the opening ceremony of the China International Aircraft Design Challenge final in Fuxin, northeast China's Liaoning Province, Oct. 13, 2021. The final of 2021 China International Aircraft Design Challenge kicked off here on Wednesday. More than 1700 competitors from about 70 universities attended the final. [Photo by Yang Qing/Xinhua]

A helicopter model performs during the opening ceremony of the China International Aircraft Design Challenge final in Fuxin, northeast China's Liaoning Province, Oct. 13, 2021. The final of 2021 China International Aircraft Design Challenge kicked off here on Wednesday. More than 1700 competitors from about 70 universities attended the final. [Photo by Yang Qing/Xinhua]

A helicopter model performs during the opening ceremony of the China International Aircraft Design Challenge final in Fuxin, northeast China's Liaoning Province, Oct. 13, 2021. The final of 2021 China International Aircraft Design Challenge kicked off here on Wednesday. More than 1700 competitors from about 70 universities attended the final. [Photo by Yang Qing/Xinhua]