The Nanning–Youyiguan Expressway (s=南宁—友谊关高速公路), commonly referred to as the Nanyou Expressway (s=南友高速公路), is a 225 kilometers in the Chinese autonomous region of Guangxi that connects the city of Nanning, the capital of Guangxi, and Friendship Pass, known in Chinese as Youyiguan, a border crossing between China and Vietnam.