Two-in-one green: green in green generally refers to the green on the surface of bamboo. Generally, folding fans have a green face. Generally, green is only elastic, and yellow is only rigid and inelastic. Folding fans should generally be matched with green and yellow, so that the rigidity and flexibility are excellent. Heqing is to split two small bones in half, and stick two strong blue faces outward and two strong yellow faces together to form a small bone. These two faces look blue and have more kung fu than two fans. Heqing is not limited to bamboo, but also two different kinds of wood, boxwood and ebony, glued together.
Three-in-one green: it is a small green bone on both sides with an ebony bone in the middle. The sides of the small bone formed in this way are green, and the middle of the small bone is still black when viewed from the side. Although it looks good, the process is too troublesome and it is usually difficult to see.