A smile is the expression of a beautiful mind. Smile needs to come from the heart to smile naturally, kindly, beautifully and appropriately. Remember not to smile for the sake of smiling, and don't pretend to smile.

2. Smile sincerely.

People have strong discrimination against smiling. Human intuition can keenly judge what a smile means and whether it is sincere or not. Therefore, when you smile, you must be sincere. A sincere smile warms each other's hearts, arouses their voices, makes him intoxicated with joy and deepens their friendship.

3, the degree of smile should be appropriate.

Smiling is a courtesy and respect for each other. Appropriate smile, for example, when the other person looks at you, you can look him in the eye, smile and nod. Smile from time to time while listening to each other's comments. If you don't pay attention to the degree of smile, if you smile impudently, excessively and without restraint, it will damage your dignity and cause the other person's disgust.