"On-duty mom" Liang Lingli is hanging up washed clothes together with a so-called left behind child. To solve the problems of left behind children, Xindu Elementary School in the Economic and Technological Development Zone of Weihai City, Shandong Province, established "Loving Care Laundry." Every week, it has an "on-duty mom" to collect and wash the dirty laundry for the left behind children.