Aerial photo taken on July 17, 2018 shows the scenery of Qianzhuang Village of Longde County in Guyuan City, northwest China's Ningxia Hui Autonomous Region. Located in the northwestern China, Ningxia is rich in natural beauties ranging from waterside landscape to scenery in cold regions. As an important protection barrier of ecological system in northwestern China, Ningxia plays a significant role in safeguarding the whole country's ecological environment. (Photo: Xinhua)

Tourists visit the Ningxia Garden at the Beijing International Horticultural Exhibition in Beijing, capital of China, Sept. 10, 2019. Located in the northwestern China, Ningxia is rich in natural beauties ranging from waterside landscape to scenery in cold regions. As an important protection barrier of ecological system in northwestern China, Ningxia plays a significant role in safeguarding the whole country's ecological environment.

Pochards fly above reed marshes at Shahu scenic spot in Pingluo County, northwest China's Ningxia Hui Autonomous Region, June 6, 2019. Located in the northwestern China, Ningxia is rich in natural beauties ranging from waterside landscape to scenery in cold regions. As an important protection barrier of ecological system in northwestern China, Ningxia plays a significant role in safeguarding the whole country's ecological environment.

Tourists visit the Ningxia Garden at the Beijing International Horticultural Exhibition in Beijing, capital of China, Sept. 10, 2019. Located in the northwestern China, Ningxia is rich in natural beauties ranging from waterside landscape to scenery in cold regions. As an important protection barrier of ecological system in northwestern China, Ningxia plays a significant role in safeguarding the whole country's ecological environment.