Local peasants worrk in the terraced rice paddy fields during the harvest season in Hoang Su Phi district of Ha Giang province, Vietnam, on Sept. 29, 2018. Located at an altitude of about 1,500 meters above sea level, Hoang Su Phi's magnificent terraced rice field was recognized as the National Relic of Vietnam in 2012. (Xinhua/Ngo Minh Tien)