What does the new middle line of the Silk Road mean?

The central line starts from Lianyungang in the east and passes through Zhengzhou, Xi 'an, Lanzhou and Xinjiang to Central Asia and Europe. According to official website 100 of the national college entrance examination, the center line of the new silk road map starts from Lianyungang on the coast of the East China Sea, passes through Zhengzhou, Xi 'an, Lanzhou and Xinjiang, goes west to Central Asia, passes through Eurasia and reaches Europe. On this central line, a key section of China passes through Gansu Province.