In China's cities, elderly migrants live on the edge

There are 18 million people aged 60 and older who spend more than six months a year living away from their registered hometowns, according to a migrant population report released by China's National Health and Family Planning Commission last month.

Unlike young migrants, who are quick-learners and have large social circles in big cities, the elderly have fewer friends and less access to healthcare, often finding it hard to adapt to an alien world.

Zhang Zhenhui, 62, is a native of Hezhou city, Guangxi Zhuang autonomous region. His son works in real estate in the regional capital Nanning.