At the age of five, Li Xiang said to Xiao Yi: I don't want to call someone shorter than me brother.
When he was fifteen years old, Xiao Yi wanted to say to Li: I have never regarded you as my sister.
When he was twenty-five years old, Li Xiang took Xiao Yi's red envelope with a smile, then turned around and introduced to the people around him: This is his neighbor's brother.