The move from a farm to the city can be jarring for many Chinese. Yang Caiguan, a retired 76-year-old farmer and laborer, is one of many who have done so in China's continued drive to urbanize its vast rural population. Last year he moved to Daojiang with his wife, Jiang, into a gated development called Songlinyuan. It had been bought for them for 350,000 yuan ($50,000) by their factory-owning son, Yang Dongsheng, out of a feeling of "xiao dao," the Chinese expression for filial piety.