Character identification (1) The stems and stems of Hu Huanglian in Tibet are cylindrical, slightly curved and occasionally branched, being 3-12 cm long and 2-14 mm in diameter. The surface is gray-brown and dark brown, with protruding buds and round roots or fine roots. The thicker ones have tight transverse wrinkles and the upper ones are densely covered with dark brown scaly petiole residues. Lightweight, hard and brittle, easy to break, cross-section light brown or dark brown, with 4-10 white vascular bundles arranged in a ring. Gas micro, extremely bitter taste. Thicker, crisper, and bitter taste are preferred. (2) Hu Huanglian is a rhizome that is cylindrical, straight or curved, and is not branched. Commercial products are mostly small, 2-9 cm long and 3-8 mm in diameter. The surface is gray-yellow to brown-brown, shiny, rough, with longitudinal wrinkles and transverse ring lines. The cork is detached brown; the upper end has residual leaves, densely scaly, dark red-brown, or semicircular after shedding mark. The root marks are round dots, and there are more near-sections. Hard and brittle, easy to break, dust when broken; the section can be seen as 4-7 vascular bundles, arranged in a ring. Gas micro, extremely bitter and lasting. It is better to use rough, broken dust, dark gray cross-section, and bitter taste. 3M Vhb Foam Tape,Gray Acrylic Tape,Acrylic Tape Adhesive,Double Sided Acrylic Foam Tape Kunshan Jieyudeng Intelligent Technology Co., Ltd. , https://www.yuhuanptapes.com