中学生毛头由于偷东西被学校开除已有好几年了。在夏季的无聊之中,他花了两块钱买了一只非良种鸽子,并为它取名叫“混血儿”。“混血儿”经常往医院里飞,在那里,毛头结识了身患骨癌的女中学生叶绿,并把友谊和欢乐带给了她。毛头家住在破旧的棚户区,母亲早逝,父亲又瘫痪在床上,生活的窘况不得不使他到处觅活,并渴望 It has been several years since middle school students had been expelled from school because of stealing. In summertime boredom, he spent two bucks to buy a non-breeding pigeon and named it a half-breed. “Half-breed” often flew to the hospital, where Mao met the green leaves of a female middle school student suffering from bone cancer and brought her friendship and joy to her. Living in shabby shanty towns, her mother died young, her father paralyzed in bed again, and the predicament of living had to make him look for life and long for