儿子在时乐满堂，                 

儿子离家空留床。

床上单被无叠褶，                 

三月不回思段肠。

春季竟不回，                         

酷暑也不在。

瑞雪撒落时，                         

吾儿尽归来.

Every parents would miss their children when they leave home for education in far away places; parents long for children's resturn, enjoy their company, and even occasional we-chat! This is what is called parenting.