You must go to Xi 'an. It's a song written by young old boys. According to Tik Tok's information, "Always go to Xi 'an" is a popular tourist slogan to attract people to visit Xi 'an and feel the charm and culture of the ancient city. This sentence was also used as the name of a song, which was written and sung by the young old boys and posted on the vibrato platform. This song describes the scenery, food, history and culture of Xi 'an, and expresses the love and yearning for Xi 'an with a relaxed and pleasant melody.