The ninth pass in the world - Niangzi Pass, a majestic pass, a dangerous road, beautiful waters and towering mountains, is the eastern gate of Shanxi, located in Niangzi Pass Town at the junction of Shanxi and Hebei. Niangzi Pass was originally called "Weize Pass", but later when Princess Pingyang led her troops to garrison here, her troops were called "Niangzi Army", hence the current name.