An intriguing reference which some believe could possibly be a type of marbling is located in a compilation finished in 986 CE entitled ???? (Wen Fang Si Pu) or "Four Treasures in the Scholar's Study" edited by the 10th century scholar-official ??? Su Yijian (957-995 CE). This compilation is made up of information on inkstick, inkstone, ink brush, and paper in China, which can be collectively known as the four treasures with the examine. The text mentions a kind of attractive paper termed ??? liu sha jian this means “drifting-sand” or “flowing-sand notepaper" that was produced in exactly what is now the region of Sichuan.