Today, 412 years ago, on May 19, 1613 (March 30, 1613 Lunar calendar), the great traveler of the Ming Dynasty, Xu Xiaoxing, began to travel to the Nanjing River. On May 19, 1613, the great traveler, scientist and writer of the Chinese Ming Dynasty, Xu Xiaoxing, from Zhejiang Ninghai, began to travel to the Nanjing River, the footprints of the current Zhejiang, Shanghai, Shaanxi, Henan, Guangdong, Hubei, Yunnan, Beijing and other 19 provinces, wrote more than 600,000 words of the " Xu Xiaoxing Travel Book", for the latter people left a valuable wealth to study the landscape of China's mountains, explore the history of the Ming Dynasty, and inspire people to pioneer tourism.