I think it is very important to have happy smile in life. Everyone has many problems in life.So will I be upset about the problem? Not at all. The more problems the more solutions.We have to find a solution without thinking about the problem. We have very little time in the world.If I spend this little time in a bad mood, then what is the success of life?We must learn to adapt to all situations.When we are upset, we should think about that moment of happiness, that moment of happiness, smile at that moment.Happiness, sorrow, laughter and tears are all in this short life.