Meng Yu stood quietly atop a peach tree, yet his thoughts were filled with the various scenes of Great Wu.
A child on the riverbank once said, "Wait by the stump for a rabbit to come crashing into it."
It means that you do nothing at all, and the enemy will crash to their death right in front of you.
And what about Meng Yu?
When the Imperial Court lacked grain, he emptied every granary in his domain. When the Imperial Court lacked weapons, he sold all the swords and spears from his lands. Of course, he didn't do it for free; he wanted the Imperial Court's propaganda that he was a truly virtuous, people-loving, and patriotic individual.
The exchange was readily accepted by the Imperial Court, after all, when you lack money, lack time, and a great calamity is forthcoming, why worry about the consequences when such a fool is willing to help?