Zhang Haiyun, who was born into a farm family, was destined to become a rural teacher in a mountain village at the age of eighteen. Stubborn and dull, he conscientiously performed his duties as a teacher according to his own way of thinking in order to change the educational situation in rural areas. However, he was repeatedly misunderstood and attacked. Later, with the help of his friends, Zhang Haiyun walked out of the mountain village and became a citizen. The feasting and feasting of the city did not make Zhang Haiyun feel happy. On the contrary, it strengthened his determination to fundamentally change people's destiny and try to see how a little person can survive in adversity.