Energy

Sun Tzu said: The principles of governing a large force are the same as those for governing a small unit; the key lies in recognizing the difference in their numerical strength. Similarly, the fundamentals of commanding a large force in battle are the same as those for commanding a small unit; the crucial aspect is understanding the difference in their organizational structure and corresponding designations. To lead an army and ensure its invincibility in the face of the enemy, one must skillfully employ both regular and irregular troops. Wherever the army advances, it should be like a stone striking an egg, achieved through the flexible application of the concepts of solid and void, attacking the enemy's void with one's solid strength. In general, in waging war, one engages the enemy with regular troops and achieves victory with irregular ones. Those skilled in employing irregular tactics possess an inexhaustible variety of methods, akin to the infinite changes in the universe and the relentless flow of rivers. The movement of the sun and moon repeats endlessly, as......