What do you mean, "jade asks for a good price in the rafters, and women wait to fly in the rafters"?

In the poem written by Jia Yucun in Cao Xueqin's Dream of Red Mansions, this sentence did not say what he wanted, but borrowed jade to wait for a better price on the rafters. Metaphorically, my current talent shortage is temporary and will soar as long as the time is ripe. He expressed his willingness to actively participate in the official career to Zhen, hoping to embark on the official career as soon as possible. But the author also hinted at Lin Daiyu and Xue Baochai.