马卫东在镇上经营着一个小小的家电销售中心。最近店里老是收到假钞,他决定去买一个验钞机,顺便带上儿子出去历练一下。他儿子叫马小天,十五岁,长得虎头虎脑。但因为这孩子长相太老实,马卫东生怕他吃了亏,从小就把他在商场中摸爬滚打出来的经验倾囊相授,并谆谆教诲:“这就是社会法则,处处有风险,生存就是战争,因此为人不能太老实,办事要机警。” Ma Weidong in the town operating a small appliance sales center. Recently, the store always received counterfeit money, he decided to buy a currency detector, by the way with his son out of life experience. His son, Ma Xiaotian, is fifteen years old and looks like a tiger. However, because of the child looks too honest, Ma Weidong feared he had a loss, childhood put his experience in the mall fought out and confess, and shy: “This is the social law, there are risks everywhere and survival Is the war, so people can not be too honest, work to be alert. ”