Farmers arrange newly-harvested hotbed chives at Zhangjiadaping Village of Xiliugou Sub-district in Xigu District of Lanzhou, capital of northwest China's Gansu Province, Dec. 19, 2018. (Photos: Xinhua)

Farmers harvest hotbed chives at Zhangjiadaping Village of Xiliugou Sub-district in Xigu District of Lanzhou, capital of northwest China's Gansu Province, Dec. 19, 2018.

Farmers arrange newly-harvested hotbed chives at Zhangjiadaping Village of Xiliugou Sub-district in Xigu District of Lanzhou, capital of northwest China's Gansu Province, Dec. 19, 2018.

A farmer harvests hotbed chives at Zhangjiadaping Village of Xiliugou Sub-district in Xigu District of Lanzhou, capital of northwest China's Gansu Province, Dec. 19, 2018.

Farmers arrange newly-harvested hotbed chives at Zhangjiadaping Village of Xiliugou Sub-district in Xigu District of Lanzhou, capital of northwest China's Gansu Province, Dec. 19, 2018.

Farmers harvest hotbed chives at Zhangjiadaping Village of Xiliugou Sub-district in Xigu District of Lanzhou, capital of northwest China's Gansu Province, Dec. 19, 2018.