Xu Xiake's famous aphorisms are:

1. A leopard can be seen in a tube.

2. There is no mountain in the world to climb Mount Huangshan.

3. When you come back from the Five Mountains, you don’t see the mountains. When you come back from Huangshan, you don’t see the mountains. A real man looks at the blue sea in the morning and the sky at dusk.

Xu Xiake, whose name was Hongzu, whose courtesy name was Zhenzhi, and whose nickname was Xiake, was Han nationality and a native of Jiangyin, Jiangsu Province. He was a geographer, explorer, traveler and writer in the late Ming Dynasty.

The more than 2.6 million words "Xu Xiake's Travels" written by Xu Xiake after 30 years of investigation opened up a new direction in geography to systematically observe and describe nature. "Xu Xiake's Travels" is a masterpiece of geography that systematically examines the landforms and geology of the motherland. It has far-reaching influence at home and abroad.