Service with a smile has become a popular concept in almost every industry. In order to popularize the working smile, there are smile institutes in Japan and other countries, where you can learn a lot of basic theoretical courses about smiles and laughter. A Fortune 500 company specializing in medical equipment has also developed a face-recognition instrument to measure the physiological degree and quality of smiles in order to "adapt to the needs of the market," and the instrument is selling so well that many industries and companies want to take it back to improve and monitor the quality of their employees' smiles.
This is a very important tool for the development of the smile.