The force of holding the corner, a Chinese idiom, the pinyin is jǐ jiǎo zhī shì, holding the corner: refers to pulling the leg and grabbing the corner. Originally it refers to attacking the enemy from two sides; now it is a metaphor for cooperating with each other to attack the enemy from two sides in war, or dedicating part of the force to contain the enemy. From "Zuo Zhuan·Xiang Gong's Fourteenth Year".

Usage of "turning the corner":

1. Partially formal; used as an object; a metaphor for cooperating with each other and attacking from both sides.

2. According to Xinhua Idiom Dictionary, Second Edition of The Commercial Press, the force of holding one's horn is also the force of one's horns.

3. Example: Xuzhou cannot stay in the enemy-affected area for a long time; it is better to divide the troops to station in Xiaopei and guard Pi City to guard against Cao Cao. (Chapter 22 of "The Romance of the Three Kingdoms")

Why has the corner-turning force never been won:

First of all, the corner-turning force is a defensive tactic.

Secondly, the situation requires tacit cooperation between both parties.

Thirdly, the power of the horns will disperse the troops and weaken the main body.

To form a cornering tactic, part of the troops must be divided, and the supply of money and food will be very embarrassing. If the enemy is stationed in the main city, the enemy only needs to besiege the secondary city, and the secondary city will not attack itself. If grain and grass are garrisoned between the two cities and the enemy captures the garrison, both cities will be destroyed without attack. In the Battle of Guandu, Yuan Shao was defeated and the garrison was burned down.

In short, the force of turning the corner is not suitable for high-intensity war environments. Although the tactics are clever, it is difficult to achieve real results, so the force of turning the corner has almost never been successful.