1. Gourd bed: equipped with throat device, shaped like a gourd. It needs to be made twice in production, and the process is complicated. The place near the waist is the thinnest, and when the airflow passes, it can cause edge sound effect again, so that the high-pitched range of the trap can be appropriately expanded. Because the piano body is longer, it is more convenient and labor-saving to play, and the timbre is softer than the traditional oval.
2. Grip method: Hold the violin and control the sound hole with ten fingers and the root of thumb.
3. Yuanyang spectrum: refers to the binary spectrum with different pitches, opposite directions and connected bases. The two ends of this urn have a blowing hole, and the sound holes of the upper and lower urns are exactly the same as those of ordinary urns. You can quickly change when you play.
4. Mother and child: refers to two conjoined urns with different sizes and the same direction. The interval between the big urn and the small urn is generally pure five degrees. For example, the big one is G, and the small one is D. You can also combine them as you like.
5. Tau-head ring: According to the improvement of Ningxia Hui musical instrument, it has a hole of 10, ranging from bass 5 to treble 2, and has a sound insulation board inside, which is round and thick and easy to blow the treble. The disadvantage is that the hole is slightly larger and the scope is not easy to expand.
6. Bullet pad: the latest patented product of Feng's ceramic pad. The inner gourd-like pad adopts double-cavity structure, which is easy for beginners to master at will and easy to play high notes; The disadvantage is that it is not easy to blow down.
7. Lady's urn: The hollow musical instrument is designed with the theme of ancient lady's image, and its urn is mostly made of Ni Xingtao, one of the four famous pottery in China, which is an unglazed kiln.
8. Pen container: named after the appearance of the pen container. The common ones are gourd, bull's head, bullet, pen container and oval. Others are rare.