Where there is a will, things come true. Even if the cauldron sinks the boat, the hundred and two Qin passes will eventually belong to Chu.

If you work hard, God will not let you down. If you lie on the firewood and taste the courage, three thousand Yuejia can swallow Wu.

The entire couplet can be interpreted as:

Those who are ambitious will succeed in everything they do, just like Xiang Yu who broke the cauldron and sank the boat, eventually returning all the Qin Pass to Chu;

For those who work hard, God will not let them down, just like Gou Jian, who destroyed the state of Wu with only three thousand soldiers and horses.

This is a couplet given to Pu Songling by Yan Mai in order to praise his perseverance. It is located in Zhang Yupu's study - Liaozhai. Two allusions are used here. The first couplet tells the historical fact that Xiang Yu led his troops across the Wei River at the end of the Qin Dynasty, sank the boat, risked his life and survived, and finally defeated the main force of the Qin army; the second couplet describes the inspiration of King Gou Jian of Yue after his defeat. The story of purpose.