Literature Reference: 谁能思此计，空备满床书。—— 《闲居遣怀十首 二》 Who can think of this plan, with books piled high on the bed. Source from 'Xianju Qianhuai Shishou Er'.
此:
This, precisely this.
计: Calculation and planning, later extended to mean strategies and methods.
Meaning: This plan signifies a well-thought-out strategy, symbolizing wisdom and foresight.