Square Shi Qu Yan (Stone Canal Inkstone) is rare. Its creation is the result of the emergence of different styles and variations of inkstone designs in the Qing Dynasty. This inkstone is big and heavy, which is one of the styles of the Qing inkstones. This Duan inkstone is from Mazikeng with blessing inscription on the four sides and Deng stone at the back. The inscription was carved at later times.