Zhang Hongshi, a right-jade man who grew up playing on the city wall, has a deep-rooted wall complex for the Great Wall. Zhang Hongshi's excavation research was all out of his own pocket.
Inspection, book publication, collection, and purchase of books are all at their own expense, and the only pension is used to serve Youyu. For more than ten years, Zhang Hongashi will collect a large number of historical relics of Youyu, like "treasures", and he believes that he will be able to preserve the history.