The small Hulei in the picture is 45 cm long and 16 cm wide, and is made of a single piece of hardwood. At that time, the craftsman did not know the name of the tree trunk, but after the later examination, it suddenly thundered, and it was considered to be "sandalwood." It is probably the red sandalwood commonly known by today's national musical instrument makers.

The lower part of the qin is carved with an oval abdominal cavity, which is covered with python skin to form a half-pear-shaped resonance box. The upper part of the piano is a neck with a narrow top and a wide bottom. There is no grade. There is a flat and long sound hole directly below. The top of the head is carved with a very delicate faucet. of small beads.
On the left side of the qin head, there are two qin qin made of ivory. Below the mountain pass on the front of the neck, there are three characters "Xiao Hulei" inlaid in silver in seal script, and the back of the neck is engraved with eleven characters in regular script "Chen Hong hand-made Gong Xian Jianzhong Xin Youchun". Han Hong (723-787 AD) was a famous painter in the Tang Dynasty. He once painted the famous "Wenyuan Tu" and "Five Bulls". He was also a musician and loved to play the lyre. Jianzhong Xin You was the second year of Emperor Dezong Li Yi's reign, that is, 781 AD.