Specification :

Origin: Red Rock Forest, Changbai Mountain, Jilin, China
Grade:
Class A: The ears should be dark brown with brightness and gray back. Does not allow ears with defects( such as fist ears, flow ears, loss of ears, moth-eaten ears and rotten ears) . The ears should be intactness. The mesh can not be larger than 2cm in diameter. Water content can not exceed 14% . Wet and dry ratio of 1: 15 or above. Ear thickness should be reach to 1mm or more; Impurities can not exceed 0.3% .
Class B: The ears should be dark brown with gray back. Does not allow ears with defects( such as fist ears, flow ears, loss of ears, moth-eaten ears and rotten ears) . The ears should be intactness. The mesh can not be larger than 2cm in diameter. Water content can not exceed 14% . Wet and dry ratio of 1: 14 or above. Ear thickness should be reach to 0.7mm or more; Impurities can not exceed 0.5% .
Class C: Ears are mostly shiny black-brown or light brown; Fist ears less than 1% ; Flow ear does not exceed 0.5% ; Does not allow the loss of ears, moth-eaten ears and rotten ears;