The matrix in Changhua Bloodstone is called “groundâ€, and the color is mostly white, yellow, gray, etc.; the red color formed by cinnabar is called “bloodâ€, and there are various “blood†colors of different colors. Many varieties are divided into different colors and textures of “landâ€, among which the most famous and most precious varieties are: Dahongpao : The amount of "blood" is greater than 50%~70%. Extremely rare, it is best to freeze red blood, very rare. Red hat : the upper part is full red, the lower part is frozen stone, and the blood content is about one-third. Hongyun articles : "Blood" is often discontinuous in the "ground", but in a cloud-like pattern, very precious. Liu Guanzhang : Red, white and black, the quality is also the next precious variety. Peach Blossom Chicken Blood: Full of "blood" spots on the frozen ground, such as the falling English powder, bright and dazzling, the best in Changhua Stone. White jade chicken blood: white (ground), erythema on the cloth, bright and dazzling. Glass chicken blood : "ground" is transparent, and the inside and outside contains "blood", which is extremely valuable. High-quality bloodstone is generally used to make stamps, and quality is used for carving crafts. In the Forbidden City Museum in Beijing, there are more than a dozen pieces of Qing Dynasty emperor's blood vessels in the Qing Dynasty. It is a treasure. Modern quality Changhua bloodstone is extremely difficult to obtain, and the price of each printed stone can be as high as tens of thousands to hundreds of thousands of yuan or more. Keylocking threaded inserts are used to quickly repair stripped, damaged or worn out threads. Threaded insert products are also used in original equipment where they strengthen threads in soft metal like magnesium or aluminum. Keylocking Insert,Key Locking Thread Inserts,Keylocking Thread Repair Insert,Recoil Key Locking Inserts Shenyang Helisert Technology Co., Ltd , https://www.helisert.com