Smiling is an indication of a peaceful mindset and an expression of kindness. To ordinary people, smiling is really common.
When a person's mood is in a healthy condition, a smile would be used as an indication of friendliness during conversations between people. People are able to smile by nature, but few people know that every time one smiles, 80 muscles from the face down to the waist would participate in this act.
Thus, it really wasn't an easy task to make Lin Chuyin learn how to smile.
Because she'd never smiled before. She didn't understand emotional changes and how to control the muscles in her face and body to combine into a smile.
And today, she was going to relearn the first lesson that a person had gone through after he or she had come to this world.