Often peeled into several petals, the base is connected, and some are in irregular sheets, 1 to 4 mm thick. The outer surface is orange-red or red-brown, with fine wrinkles and concave dot-shaped oil chambers; the inner surface is light yellow-white, rough, with yellow-white or yellow-brown vascular bundles. The quality is slightly hard and brittle. Scent, bitter, bitter. Guang Chen Pi: Often 3 petals are connected, neatly shaped, uniform in thickness, about lmm. The dot-shaped oil chamber is large and transparent to the light. The quality is relatively soft.
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