Gu was an outstanding thinker, historian, geographer and phonologist in the late Ming and early Qing Dynasties. He traveled all his life, taking Wan Li Road and learning from thousands of books. He founded a new learning method and became a master in the early Qing Dynasty, and was known as the "founder of the Qing Dynasty". Gu is knowledgeable, and has studied the national code system, anecdotes of counties and cities, astronomical phenomena, river basins, military and civilians, classics and history, and phonological exegesis. In his later years, he emphasized textual research, which opened the atmosphere of park learning in Qing Dynasty. His knowledge is based on erudition and self-shame, and he learns from time to time, and if he learns well, he becomes an official. Poetry is a masterpiece when feelings are hurt.

When Gu went out to travel, he followed himself with books on his back with horses and mules. When you get to a dangerous place, ask a retired officer for details of the place you have been. Sometimes I find that the situation I went to is not quite consistent with what I usually know, so I go to the market inn to open the book, check it and correct it. Sometimes, walking directly on the flat road is not worth stopping to inspect, just silently reading notes and proofs of various ancient classics on horseback; If I forget something occasionally, I will open my book in the inn and review it carefully.