1, that's the nerve body of silkworm. Silkworm pupa itself is the intermediate process of silkworm becoming moth. Through the process of moth breaking cocoon, we can know that the black stripes in silkworm chrysalis are actually its "real body". The appearance of the black shell of silkworm chrysalis is similar to that of silkworm, but it is just the outer skin of silkworm.

2. The white between the outer skin and the black stripes is high-purity protein, which is the source of aroma and nutrition of silkworm chrysalis. Black stripes are not feces, but the nervous body of silkworm, that is to say, the black core in silkworm chrysalis is the embryonic form of moth. Silkworm pupa, also called bee, is a high-protein nutrient. Late silkworm excrement (silkworm excrement), silkworm chrysalis, cocoon, Beauveria bassiana (silkworm infected with Beauveria bassiana and dying), etc. , are used as medicine.