People have realized that traveling can keep them healthy. Neijing said: "The highest moral integrity, harmony of Yin and Yang, four seasons, die of vulgarity, concentrate on marching between heaven and earth, extend the audio-visual reach, benefit his life and make him strong." Andersen said: "For me, travel is the secret of rejuvenation." Mo Luoa, a French writer, believes that the best way to eliminate mental trauma such as tension, sadness, depression and boredom is to travel. He once said: "The most extensive and merciful refuge is nature. The vastness of forests, mountains and oceans contrasts with our personal narrowness and soothes our spiritual wounds. " Nowadays, the tourism industry is widely rising around the world, and tourism fitness has become the fashion of the times.