What was the ancient land trade route from China to Asian, African and European countries?

It is an ancient commercial and trade route that started from the political, economic and cultural center of ancient China and connected Asia, Africa and Europe. It passes through the Longshan Mountains, the Hexi Corridor, Yumenguan and Yangguan, reaches Xinjiang, along the oasis and Pamirs, passes through Central Asia, West Asia and North Africa, and finally reaches Africa and Europe. It is also the main road for economic, political and cultural exchanges between the East and the West. Its original function was to transport silk produced in ancient China. Therefore, when the German geographer Ferdinand von Richthofen first named it "Silk Road" in 1970s, it was widely accepted. (Excerpted from UNESCO's statement on the joint application for the Silk Road)