Starting about 200 years before the birth of Christ, a trade route was developed that linked China with the Mediterranean. It was built by the rulers of China's Hun Dynasty and for 1,500 years it was used to trade silk, and other articles of value. It was known as the Silk Road and ran through China, India, Persia, Arabia, Greece, and Rome. In addition to Silk, it also exchanged ideas and religions. These days, China is developing a modern equivalent to the Silk Road known as the "Belt and Road Initiative". Burt travels to China to explore the history of the ancient road and learn about the new road. He also visits the Great Wall of China, which was built to protect the road.