The upper part of this combo photo shows 61-year-old Wang Yucan (R) and his wife Wei Xiulan posing for a photo in front of their adobe house in Doujiazhuang Village in northwest China's Gansu Province in 2005. Their house was built in 1960s. The lower part of the combo photo taken by Fan Peishen on Nov. 29, 2018 shows 74-year-old Wang Yucan and his wife Wei Xiulan posing for a photo in front of their brick house built in 2010 with the help of government. (Xinhua)