抱椠怀铅

Explanation: Lead, lead powder; Qian, wooden slips. All writing instruments. Refers to the diligent writing, collation. With the "grip hold Qian lead" 　　Source: Song Shen compliance "thank two governments three Kai": "However, lead and hold Huai Qian, Cheng Ming almost out of the Department; charge capsule holding sack, down almost Taiwei of the Mountain." Thesaurus:  Woqianbaoqian, baoqian, woqian, woqian