All right, let's go. National Highway 209, also known as "Subei Line", was a famous "landscape avenue" in go on road trip circle in its early years, from Zuo Qi, Su Nite, Inner Mongolia to Beihai, Guangxi. The road condition of National Highway 209 on Subei Line in Inner Mongolia is still very convenient, extending 100 kilometers to the north, crossing Yinshan Mountain and reaching Zuo Qi, Su Nite, with a total length of 3,660 kilometers. The Subei Line passes through Inner Mongolia, Shanxi, Henan, Hubei, Hunan and Guangxi provinces.