Barley seeds are sowed by a farmer of Gangga Village in Nyalam County of Xigaze City, southwest China's Tibet Autonomous Region, April 26, 2019. As the weather warms up, spring plowing here starts, which extends from low altitude areas toward high altitude ones.((Photo: Xinhua)

Barley seeds are sowed by a farmer of Gangga Village in Nyalam County of Xigaze City, southwest China's Tibet Autonomous Region, April 26, 2019. As the weather warms up, spring plowing here starts, which extends from low altitude areas toward high altitude ones.((Photo: Xinhua)

Barley seeds are sowed by a farmer of Gangga Village in Nyalam County of Xigaze City, southwest China's Tibet Autonomous Region, April 26, 2019. As the weather warms up, spring plowing here starts, which extends from low altitude areas toward high altitude ones.((Photo: Xinhua)

Barley seeds are sowed by a farmer of Gangga Village in Nyalam County of Xigaze City, southwest China's Tibet Autonomous Region, April 26, 2019. As the weather warms up, spring plowing here starts, which extends from low altitude areas toward high altitude ones.((Photo: Xinhua)

Barley seeds are sowed by a farmer of Gangga Village in Nyalam County of Xigaze City, southwest China's Tibet Autonomous Region, April 26, 2019. As the weather warms up, spring plowing here starts, which extends from low altitude areas toward high altitude ones.((Photo: Xinhua)

Barley seeds are sowed by a farmer of Gangga Village in Nyalam County of Xigaze City, southwest China's Tibet Autonomous Region, April 26, 2019. As the weather warms up, spring plowing here starts, which extends from low altitude areas toward high altitude ones.((Photo: Xinhua)

Barley seeds are sowed by a farmer of Gangga Village in Nyalam County of Xigaze City, southwest China's Tibet Autonomous Region, April 26, 2019. As the weather warms up, spring plowing here starts, which extends from low altitude areas toward high altitude ones.((Photo: Xinhua)