Chen Yi is a left-behind child who lives with his grandfather.
Living next door to Chen Yi and his grandfather is a single-parent family with a mother and her son.
The kid next door is named Xia Jingxing, one year younger than Chen Yi.
Xia Jingxing didn't learn well, but he always hoped that Chen Yi would do well.
Purpose: Don't drive when you drink, and don't drink when you drive.