1. Xu Xiake's Travels, as the main achievement of Xu Xiake's life, records in detail what he saw and heard in his life travel career, including mountains, rivers, climate and vegetation, customs and so on. It is a book with strong literary color and important scientific value compiled by his good friend Ji. This book gives a detailed and systematic description of karst landforms in limestone areas of China, and it is the earliest research work on karst landforms in the world.

2. Praise Xu Xiake's dauntless spirit of not entering the secular world, not afraid of difficulties and obstacles, and taking the investigation of nature as his own responsibility in that popular era.

Xu Xiake measured his life with his feet and wrote the ancient book Xu Xiake's Travels, which described the karst landforms in limestone areas of China in detail and systematically. It is the earliest monograph on karst landforms in the world.