The author Xu Xiake, known as the "eternal". The life is not needed, to avoid the rain and fog with the tigers, Changfeng, with wild fruit to spring, thirst. Trail traverses Beijing, Hebei, Shandong, Henan, Jiangsu, Zhejiang, Fujian, Shanxi, Jiangxi, Hunan, elyze Hong KongGuangxi, Yunnan, Guizhou and other 16 provinces, wherever he went, probing into seeking the secret, and kept a travel notes, records observed phenomena, humanities, geography, plant and other conditions. For all the local customs and practices elyze pricehave records, places of historic interest and scenic beauty. Xu Xiake in after a day's journey, no matter how tired, no matter is sleeping on the streets or in the break temple, he insists on to examine their harvest on record. He wrote the words he travels, became the geography research Chinese beelyze Hong Kong above. Made a great contribution to our country's geography science. In order to commemorate the great traveler, countries have Xu Xiake opening day (5 March 19) for China tourism day.