What do you mean by hiding something in your bag?

The awl in the pocket: the awl in the pocket can't be hidden. Metaphor is hard work, meddling.

Interpretation of Ping Yuanjun's Biography of Historical Records and Yuqing: "Ping Yuanjun said:' A wise man is like an awl in a bag, and he will never see it ...' Mao Sui said:" I am sure of winning today. It was not the last thing I saw that made me get into the bag early. After "cash-strapped" means to give talented people a chance to show themselves.