The most important thing in making friends is the character of the other person. No matter how poor or rich a person is, his character is the most important. It is difficult for a person with bad quality to be treated sincerely. A sincere and kind person will treat his friends sincerely, help them, and will not betray them at critical moments.
Friends should be sincere and frank, and help each other when necessary, instead of making friends for the purpose of profit. In that case, it is purely a relationship of interest, fair-weather friends, and they can avoid difficulties. Only true friends can stand up in times of difficulty.