What are those things in Yuanmingyuan?

Yuanmingyuan is rich in books and cultural relics. Now, just a few examples are given. Wen Yuan Pavilion is a library building modeled after Ningbo Fantianyi Pavilion. It is one of the four famous royal pavilions in the north, which was built in Qianlong for forty years. In the pavilion are the Sikuquanshu ordered by Qianlong and the Integration of Ancient and Modern Books compiled by Kangxi. Sikuquanshu is the largest comprehensive series in ancient China, with more than 3,400 kinds of books, nearly 80,000 volumes and more than 36,000 volumes. Due to the voluminous articles in the book, the most important one at that time was selected and compiled into the Summary of Sikuquanshu, with a total volume of 12000. The manuscript of Yao Hui is divided into two parts, one is in the algae hall of the Forbidden City, and the other is in the "tasting room" of the East Wing of Changchun Garden. In addition, there is a famous Wenxuan in Hanjingtang-Chunhua Xuan, which was specially built to collect the manuscripts of the famous French post "Chunhua Pavilion Post". Ge Tie was first copied in the third year of Chunhua in the Northern Song Dynasty (992), and included the calligraphy works of 99 people, including Wang Xizhi, Wang Xianzhi, Cang Xie, Yu Xia and Confucius. The Post is divided into ten volumes, which is the first large-scale cluster post in China, and is known as the ancestor of ten thousand posts. During the Qianlong period, according to the Northern Song Dynasty's "The Initial Extension of Getie", this stone was carved with a hook after careful revision. It lasted for three years. In the spring of the thirty-seventh year of Qianlong (1772), about 24 cloisters in front of Chunhua Xuan were inlaid with 144 engravings. This is the famous "Gan Da Engraving Chunhua Pavilion Post". Needless to say, during the theft of Yuanmingyuan, precious books and cultural relics such as Sikuquanshu, Quanquanyao, Integration of Ancient and Modern Books, and Chunhua Pavilion Post were not spared. This can reflect from one side that the imperialist invaders burned Yuanmingyuan, which caused great damage to human culture.