Brother's explanation
Big brother is a respectful name, which shows that he is loyal, loyal and has a good relationship. Calling you big brother is an appreciation of your friendship, a compliment to your friendship and an affirmation of your status. Others call you big brother to show respect, others call you big brother to show admiration, and others call you big brother to show approval. Although the eldest brother is short, he is closely related to his status, position, friendship and responsibility.
I think there are several situations. The first situation is that your social status is relatively high and you can bear this title. In the second case, you are old, which is just a courtesy title. In the third case, I will focus on it. When a person wants something from you, he will call you big brother in a low-key way. At this time, you have to carefully screen.