What are the identification standards for the old-growth Dafugui (Lao Zhong Da Fu Gui)? Understand it all in one article

Leaf length 20cm~25cm, the longest seen is 30cm, width about 1.5cm; the outer leaves are boat-shaped, with an obliquely upright and obliquely drooping leaf posture; the leaf tips are bluntly tapered, the leaf ends form a hood with a dew-catching shape; the leaf surface is relatively flat, with raised longitudinal veins; the fine serrations on the leaf margin are not obvious; the leaf color is emerald green and glossy; the leaf texture is thick; short sturdy seedlings have thicker petioles, and longer leaves often twist to one side from the front part; the sheath is short and round and tightly clasps the petiole; new shoots emerge as brilliant purplish red, turning deep purplish red, with green visible at the tip of the shoot and a cloudy milky white point; the leaf shoots are short and sturdy. Its plant form is the standard lotus-petal flower plant form. The flower bud is purplish red with deep purple vein markings, the bud tip turns green, with layer upon layer of horseshoe-shaped sheaths, covered with a purple-sand blush, commonly known as a lotus-shaped colored sheath; the flower bud is round and neat, the sheath clothing close to the flesh is broad and short, with three raised purple veins reaching the top, forming an empty chamber at the base of the sheath and the base of the flower core; the two lower parts of the sheath form a folded shape that fills the empty chamber; the flower core is commonly known as a wooden fish mallet head, and the top of the core is slightly flat; the flower stalk is green at the base and light red.

In addition, to add a little about the relationship between Dafugui and Zheng Tonghe, some people believe they are of the same origin but different varieties. A small amount of Dafugui previously ended up in Japan while a small quantity was kept in China; at that time in China it was still called Zheng Tonghe. The so-called true old-growth Dafugui is that part of Zheng Tonghe that was then the only small amount kept in China. Most of the Dafugui on the market now has been re-imported from Japan, and true old-growth stock is as rare as phoenix feathers and unicorn horns.