2017年6月13日发布 China's first solar-powered unmanned aerial vehicle (UAV) – domestically designed and manufactured – successfully reached an altitude of 20,000 meters during a test flight in the country's northwest regions. Named "Caihong" (CH), or "Rainbow" in English, the solar drone was developed by a research team from China Aerospace Science and Technology Corporation. China is the third country to have a working solar-powered drone that can reach near space heights, following "Helios" of the US and "Zephyr" of the UK.