How the toad changed into the silkworm resulted from the homophony of the two words, the flourishing of silk knitting, the imagination and exaggeration of literators.

• 之所以“蟾”演变为“蚕”，首先是二者的谐音；其次是后世蜀地丝织业的发达；最后则离不开文人的想像和渲染。