A solar eclipse is seen in Lhasa, southwest China's Tibet Autonomous Region, June 21, 2020. (Xinhua/Purbu Zhaxi)

A solar eclipse is seen in Guiyang City, southwest China's Guizhou Province, June 21, 2020. (Xinhua/Liu Xu)

A partial solar eclipse is seen in Lhasa, southwest China's Tibet Autonomous Region, June 21, 2020. (Xinhua/Zhan Yan)

A partial solar eclipse is seen in Beijing, capital of China, June 21, 2020. (Xinhua/Xing Guangli)

A partial solar eclipse is seen in Lhasa, southwest China's Tibet Autonomous Region, June 21, 2020. (Xinhua/Sun Fei)

A solar eclipse is seen in Beijing, capital of China, June 21, 2020. (Photo by Zhang Yanhui/Xinhua)