Photo taken on March 19, 2020 shows the Potala Palace after a snowfall in Lhasa, southwest China's Tibet Autonomous Region. The snowfall has improved the soil moisture which is conducive to the ongoing spring sowing. (Xinhua/Zhan Yan)

Photo taken on March 19, 2020 shows the Potala Palace after a snowfall in Lhasa, southwest China's Tibet Autonomous Region. The snowfall has improved the soil moisture which is conducive to the ongoing spring sowing. (Xinhua/Zhan Yan)

Photo taken on March 19, 2020 shows the Potala Palace after a snowfall in Lhasa, southwest China's Tibet Autonomous Region. The snowfall has improved the soil moisture which is conducive to the ongoing spring sowing. (Xinhua/Zhan Yan)

Photo taken on March 19, 2020 shows the Potala Palace after a snowfall in Lhasa, southwest China's Tibet Autonomous Region. The snowfall has improved the soil moisture which is conducive to the ongoing spring sowing. (Xinhua/Zhan Yan)

Photo taken on March 19, 2020 shows the Potala Palace after a snowfall in Lhasa, southwest China's Tibet Autonomous Region. The snowfall has improved the soil moisture which is conducive to the ongoing spring sowing. (Xinhua/Zhan Yan)

Photo taken on March 19, 2020 shows the Potala Palace after a snowfall in Lhasa, southwest China's Tibet Autonomous Region. The snowfall has improved the soil moisture which is conducive to the ongoing spring sowing. (Xinhua/Zhan Yan)

Photo taken on March 19, 2020 shows the Potala Palace after a snowfall in Lhasa, southwest China's Tibet Autonomous Region. The snowfall has improved the soil moisture which is conducive to the ongoing spring sowing. (Xinhua/Zhan Yan)

Photo taken on March 19, 2020 shows the Potala Palace after a snowfall in Lhasa, southwest China's Tibet Autonomous Region. The snowfall has improved the soil moisture which is conducive to the ongoing spring sowing. (Xinhua/Zhan Yan)