[抛砖引玉 / 拋磚引玉, pāo zhuān yǐn yùㄆㄠ ㄓㄨㄢ ㄧㄣˇ ㄩˋ] lit. to throw a brick to attract jade (成语 saw); fig. I offer a humble remark, please give us your valued opinion (e.g. commonplace remarks as a foreword to a distinguished speech)#45301
[敲门砖 / 敲門磚, qiāo mén zhuānㄑㄧㄠ ㄇㄣˊ ㄓㄨㄢ] lit. a brick as a door knocker (成语 saw); fig. a temporary expedient; to use sb as a stepping stone to fortune#54518