Praising is an ancient art in our country. It originates from life and is used for the people. It perseveres in the changes of the times and the fire of revolution, and is proud of the world. She can be colorless and odorless yet ubiquitous; she can be colorful yet ever-changing. She is really a must-have medicine for traveling at home and killing people. It can be said that the widespread application of touting science in today's society really echoes the old saying, "Serve the people!"