The antonym of encirclement

• relieve the state of zhao by besieging the state of wei wéi wèi jiù zhào
  During the Warring States Period (353 BC), the State of Wei besieged Handan, the capital of the State of Zhao. Zhao asked Qi for help. General Tian Ji and Sun Bin of Qi led the army to save Zhao, and when the capital of Wei was empty, they led the army to attack Wei. When the Wei army rescued him, the Qi army, taking advantage of his fatigue, defeated the Wei army in the middle of the road and relieved Zhao Wei. See Historical Records, Biographies of Sun Tzu Wu Qi. This strategy was later often adopted by military strategists, and was called the method of "encircling Wei and saving Zhao". The 30th chapter of The Romance of the Three Kingdoms: "Cao Cao's army plunders food, and Cao Cao is bound to visit. Since Cao Cao is out of the village, and the heart of the village is empty, you can send your troops to attack Cao Cao's village first; when you hear about it, you must return it quickly. This is Sun Bin's plan to 'encircle the Wei Dynasty and save the Zhao Dynasty'." The sixth and fourth chapters of The Water Margin: "