1, silkworm nest [cán cù] silkworm nest cáncù for silkworm cocoon grass nest, that is, "silkworm mountain"

2, silkworm sand [cán shā] silkworm sand cánshā silkworm feces, black, shaped like sand grains, after drying can be used as a pillow material or medicine.

3, Quercus serrata [zuò cán] Chinese silk moth larvae, feeding on Quercus leaves to produce Quercus silk.