Yemeni villagers harvest barley in Amran province, northern Yemen, on Oct. 30, 2021. (Photo: Xinhua)

Yemeni villagers harvest barley in Amran province, northern Yemen, on Oct. 30, 2021. (Photo: Xinhua)

A Yemeni villager harvests barley in Amran province, northern Yemen, on Oct. 30, 2021. (Photo: Xinhua)

Yemeni villagers harvest barley in Amran province, northern Yemen, on Oct. 30, 2021. (Photo: Xinhua)

Yemeni villagers harvest barley in Amran province, northern Yemen, on Oct. 30, 2021. (Photo: Xinhua)