lit. throw out a brick and get jade thrown back (idiom) / fig. to attract others' interest or suggestions by putting forward one's own modest ideas to get the ball rolling
to draw (e.g. a bow) / to pull / to stretch sth / to extend / to lengthen / to involve or implicate in / to attract / to lead / to guide / to leave / to provide evidence or justification for / old unit of distance equal to 10 丈[zhang4], one-thirtieth of a km or 33.33 meters