The world-known Silk Road across the Eurasian Continent is a friendship bridge ____1____ (link) the Europe and Asian people. It is one of the most important theme tourist routes in the world and the most ____2____ (value) tourist product in China. From the time Zhang Qian ____3____ (open) up the world-famous Silk Road during the Han Dynasty, until the collapse of the Yuan Dynasty, it enjoyed ____4____ history of about 1,600 years. Silk Road with ____5____ (it) 2,000 years history has witnessed the historical changes and the progress of cultures ____6____ (exchange) between China and the Western countries. The section in China, many ethnic cultures ____7____ (include), is also as a jade belt. The peoples of these ethnic groups such as Mongolians, Huis, Uygurs, Hazaks have maintained their unique traditions and cultures, living habits and religious beliefs,____8____ from the soul of the Silk Road and attract many tourists to visit. In fact,____9____ the Silk Road in the northwest of China, there are another two trade roads in the southwest of China and by sea, which also contribute ____10____ (great) to the development of the world. They are called the “Southern Silk Road” and the “Silk Road on the Sea”.