You must drive 3 18 in this life. The purpose of the sticker is to commemorate the trip. According to relevant public information, 3 18 refers to G3 18, which is located on a mysterious road at 30 north latitude. Everyone equates 3 18 with the "Sichuan-Tibet line", which means that people yearn for the 3 18 line and want to drive on this road. "I must drive 3 18 in my life" is a popular driving slogan, which means that I must go to the national highway 3 18 in China and Tibet once in my life, and the sticker is to commemorate this trip and also a way to show my travel experience and personality.