Liu's collection can be divided into the following categories:
One, "The Iron Cloud Hides the Turtle" six volumes. In the 29th year of Guangxu, Liu selected more than 1000 pieces of Oracle Bone Inscriptions's offerings from his own collection of Oracle Bone Inscriptions's offerings, and published them into a book, which became the first collection of Oracle Bone Inscriptions's offerings in China.
Second, "Tieyun Tibetan Seal". Seal more than 3,000 products and divide them into four volumes.
Third, "iron clouds hide pottery." Rubbing unearthed pottery into books.
Fourth, Baoding compiled a volume "Supporting the Disabled and Keeping the Insufficiency of Foraging and Hiding", listing the objects such as Yi wares.
Fifth, "iron clouds hide springs." There are four kinds of ancient shellfish, four kinds of ant nose money, seventy-one kinds of hollowed-out cloth, twenty-one kinds of large and small shoulder bridge foot cloth, six kinds of square shoulder bridge foot cloth, six kinds of large and small shoulder foot cloth, eight kinds of square shoulder foot cloth, eighty-seven kinds of square shoulder foot cloth, ten kinds of round head foot cloth and two kinds of round head foot ancient hole cloth. Finally, there are 500 kinds of row knives and 1 kind of staggered gold knives, all of which are rubbings and very precious.
6. As for rare books, Song and Ming rubbings, ancient calligraphy books and famous paintings, they have also been photocopied and published one after another.