Correct answer: Xu Xiake

Xu Xiake (formerly known as Hongzu, 1587-164 1), nicknamed Xia Ke, was born in Jiangyin, South Zhili (now Jiangyin City, Jiangsu Province), a geographer, explorer, traveler and writer in the late Ming Dynasty, and was also called "the sage of the East and the West" with Kyle Polo. During more than 30 years' travel and inspection, Xu Xiake traveled four times and traveled all over China. Xu Xiake's trip is not only for innovation and success, but also for exploring the mysteries of nature. His investigation and study of mountains and rivers, waterways, geology and landforms has made achievements beyond those of his predecessors, and he wrote his masterpiece "Xu Xiake's Travels".