A large number of migrant rural labor force, resulting in increased empty nest elderly, left-behind children in rural areas, agricultural land is barren.
农村劳动力大量进城务工，造成农村空巢老人、留守儿童增多，农田荒芜。
In 2005, about 55 million children were "left behind" in rural areas, most to be raised by their grandparents.
2005年，农村留守儿童数量达到5500万左右，他们大部分都由祖父母照顾。
Statistics are unreliable, but perhaps 200m rural migrants are working in urban areas, with some 20m children. Many more children are left behind, in the care of relatives.
据不完全统计，有大约2亿来自农村的外来务工人员在城市工作，有2千万儿童跟随父母来到城市，更多的孩子被留在家乡，由亲戚照顾。
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