Yang Wanping, 54, lies on a bed at a rental room in Beijing. The photo was taken on April 2, 2017. [Photo/VCG]

Yang and his wife moved to live with their son in Beijing in March, 2017, to take care of their grandson. The pair, from Shanghai, pay 1,600 yuan a month to live in a single room, based in Beijing, with their son, his wife and their almost one-year-old grandson. "We used to rent a room at a bungalow in Shanghai with a monthly rent of 500 yuan. The housing rent in Beijing is rather expensive," Yang said. He added the pair will move back to their hometown in Wuhu city, East China's Anhui province, when the baby is old enough to go to school.