Lu Xing's family, Er Aunt's family and He Zhi's family are neighbors. (Their home is downstairs) He Zhi is one year younger than Lu Xing. He has liked Lu Xing very much since he was a child. He has always been attached to him and called him brother Xing. When Lu Xing was a kid, he only thought He Zhi was a follower and didn't care about him at all...
Purpose: To show the growth experience of human beings in the context of the times.