A staff member inspects the liquor sample at the Xige Estate in northwest China's Ningxia Hui Autonomous Region, April 10, 2020. Workers of wine companies in the east Helan Mountain area are busy with farm work in grape plantation and making efforts to take orders to promote local wine industry. (Xinhua/Wang Peng)

A staff member conducts sampling inspection to the finished wine products at the Xige Estate in northwest China's Ningxia Hui Autonomous Region, April 10, 2020. Workers of wine companies in the east Helan Mountain area are busy with farm work in grape plantation and making efforts to take orders to promote local wine industry. (Xinhua/Wang Peng)

A staff member inspects the liquor sample at the Xige Estate in northwest China's Ningxia Hui Autonomous Region, April 10, 2020. Workers of wine companies in the east Helan Mountain area are busy with farm work in grape plantation and making efforts to take orders to promote local wine industry. (Xinhua/Wang Peng)

Aerial photo taken on April 10, 2020 shows staff members of the Xige Estate working in a grape plantation in northwest China's Ningxia Hui Autonomous Region. Workers of wine companies in the east Helan Mountain area are busy with farm work in grape plantation and making efforts to take orders to promote local wine industry. (Xinhua/Feng Kaihua)

Aerial photo taken on April 10, 2020 shows staff members of the Xige Estate working in a grape plantation in northwest China's Ningxia Hui Autonomous Region. Workers of wine companies in the east Helan Mountain area are busy with farm work in grape plantation and making efforts to take orders to promote local wine industry. (Xinhua/Feng Kaihua)