"Hai shang si chou zhi lu" yu Zhong wai huo bi wen hua jiao liu = "Maritime Silk Road" and the exchange of currency and culture between China and foreign countries
Ou Ya cao yuan dong bu de jin shu zhi lu : si chou zhi lu yu Xiongnu lian meng de yun yu guo cheng = The metal road of the Eastern Eurasian steppe : the growing of Xiongnu confederation and the Silk Road