◎拋磚引玉pāozhuān-yǐnyù
[throw out a brick to attract a jade;(fig) offer a few commonplace remarks by way of introduction so that others may come up with valuable opinions] 拋出磚去，引回玉來。比喻自謙以粗淺的見解引出別人的高見
方才婢子費(fèi)了唇舌，說了許多書名，原是拋磚引玉，以為借此長長見識(shí)?！?/span>清·李汝珍《鏡花緣》