Laughter is a peaceful state of mind, a kind inner expression, and it is also the time when endorphin secretion increases in the body. When a person's mood is in a normal state, he will show a peaceful psychological effect in the conversation with others, and show the goodwill communication between people with a smile. Good and evil is the psychological function of human beings and the result of primate evolution. Laugh: Show a happy expression and make a joyful sound.

Laughter is an emotional communication and a way to convey feelings. In life, the most pleasant and kind expression is the smile on your face. I'm afraid people who never laugh in this world don't exist.

Laugh, express our feelings, exchange our thoughts and show our inner world; Laughter shows the beauty of our human beings. It will attract, catalyze, comfort, stimulate, inspire and enjoy everyone. But different ways and types of laughter let us know the meaning of laughter.

Among thousands of choices of smiles, the most beautiful one is the understanding of smiles. In the face of human right and wrong, life is bumpy and hard, we all smile. Seeing and experiencing beauty with smiling eyes, we will live as beautiful as flowers and smiles.

Sometimes, a smile is a greeting, an understanding, an encouragement and a comfort. Sometimes, a smile is a kind of soul, an art, a strength and a reward. Sometimes, a smile is a ray of sunshine, a sweet spring, a moist rain and dew, and a happy flower.

In the long river of life, smile is the most beautiful scenery we appreciate, the most acceptable smile, the most needed smile and the favorite smile. Laughter is important to life, to the world and to life. Our meaning and value are in it, and our fun is to laugh for the sake of laughing.