This is a story about a brother and sister who keep each other warm.
When he was 18 years old, Tong Xin said to Tong Xiao: "I will support you."
Tong Xiao, who was 7 years old at the time, did not understand the weight of this sentence. He grinned with his missing front teeth and said to Tong Xin: "Then when I grow up, I will take care of you too."
In the end, Tong Xiao really took it seriously.
This document is only for those who are working hard or want to work hard.