1, abalone with nine heads: the size of dried abalone is usually calculated by the number of heads per catty, such as nine heads, which means there are nine abalones per catty, so the smaller the number of heads, the larger the abalone, and the higher the price.

2. The so-called "head" refers to the number of abalones with uniform size in a kilogram (Hong Kong scale, about 0.6 kg, 1.2 kg), such as 2 heads (6 Liang/only), 3 heads (4 Liang), 5 heads, 9 heads (1.3 Liang) and/kloc. 1 head, 2-head abalone is the best, and it is hard to see. Among many abalones, Japanese net abalone has the least number of heads and high value.

3, abalone is calculated by the "number of heads". There are several abalones weighing one catty, which are called several abalones. If it is two per catty, it is called double-headed abalone; Three are called three-headed abalone; By analogy, nine are called nine-headed abalone, and an important criterion for distinguishing the grade of abalone is "the number of heads". The so-called "head" refers to the number of abalone with uniform size in a Sima Jin (about 0.6 kg), such as 2 heads, 3 heads, 5 heads, 10 heads, 20 heads, etc. The fewer heads, the more expensive the abalone is.