Dongtai painting and calligraphy (hair embroidery) mounting technique is a traditional skill item in the fifth batch of representative items of municipal intangible cultural heritage. It originated in the Qing Dynasty and flourished from the 1970s to the present. It is also called "mounting sulfur", "mounting pond" and "mounting back". It is a unique technology in my country to protect and beautify paintings and calligraphy as well as inscriptions and rubbings. It is to mount and beautify or protect and repair ancient and modern paintings and calligraphy with various silks and brocades. Paintings and calligraphy made on rice paper and silk are often wrinkled and uneven due to the colloid effect of ink, which makes them easy to break and inconvenient to watch, circulate and collect. Only after mounting the painting core to make it flat, and then according to the color intensity, composition complexity, width and length of the painting, with the corresponding silks and brocades, can it be mounted into various forms of paintings, so that the brushwork and color are more rich and prominent, so as to increase the artistry of the work.