The bamboo used for Ping bamboo curtain painting is the Ci bamboo, which is abundant in the local area of Liangping, Chongqing.

The reason for choosing Ci bamboo is mainly because it has the following unique advantages:

• Good toughness, easy to process: Ci bamboo has long fibers and strong toughness. When making bamboo curtain paintings, the bamboo needs to be drawn into bamboo silk as fine as hair. The strong toughness of Ci bamboo makes it less likely to break during splitting, meeting the requirements of this fine craftsmanship.

• Long internodes ensure even silk strands: Ci bamboo has slender internodes, with the longest reaching nearly 1 meter. Long internodes mean a smoother surface on the bamboo tube, allowing longer and more uniform bamboo silk to be drawn, which is crucial for weaving a bamboo curtain as smooth as silk.

• Excellent material quality achieves artistic appearance: Ci bamboo has thin walls and fine texture, resulting in bamboo silk that is smooth, delicate, with soft and elegant color. This provides a perfect "canvas" for painting on it, creating the unique aesthetic of Liangping bamboo curtain painting—"thin as a cicada's wing and ethereal as mist."

• Proximity to the source ensures fresh material: As a locally abundant bamboo species, sourcing locally ensures the freshness of the raw material, allowing "harvest and produce immediately," thus ensuring the best quality of bamboo silk.

In summary, the excellent characteristics of Ci bamboo make it an irreplaceable ideal choice for producing the "finest curtain under heaven"—Liangping bamboo curtain painting.