Literature Reference: 外户凭云掩，中厨课水舂。—— 《答萧建》 The outer door is closed by clouds, while in the kitchen, water is pounded. Source from 'Answer to Xiaojian'.
水: Rivers, streams, lakes, and seas collectively. It metaphorically signifies that when conditions are ripe, tasks will be accomplished smoothly.
舂: Pounding rice.
Meaning: Pounding rice with water signifies diligence and harmony with nature.