"China Pakistan joint formation split!" On the afternoon of July 13, in the sea area east of Zhoushan, with the command of the commander, the ships of the two countries participating in the China Pakistan "maritime guardian-2" joint exercise sounded the siren to say goodbye and returned home. The exercise lasted four days. China and Pakistan conducted exercises in nine subjects, including joint sea attack, joint anti submarine, and joint air defense and anti missile. Time flies, time flies. Just like the waves ploughed by the Chinese and Pakistani ships on the ocean, the joint training League has been a major way to test and improve the combat effectiveness of the Chinese army. The innovative practice of "open door training" has been constantly surging forward, increasingly enriched and perfected, and gradually matured. To build a world-class army, we must go global and understand the world. Since the 18th National Congress of the Communist Party of China, President Xi Jinping has personally drawn up a blueprint for international military cooperation, including Sino foreign joint exercises and training leagues, focusing on the great cause of building a strong military in the new era. In May 2014, during his talks with Russian President Vladimir Putin, President Xi pointed out that the Chinese and Russian armed forces should deepen cooperation in joint exercises and training, military technology, and anti-terrorism, and jointly do a good job in the Sino Russian maritime joint military exercises and the joint anti-terrorism military exercises of SCO member states. In July 2017, President Xi Jinping issued a video congratulating the opening of the "international military competition 2017" and stressed that he hoped that the Chinese armed forces would strengthen exchanges and cooperation with the armed forces of relevant countries, constantly achieve new achievements in international military cooperation, and make new contributions to the maintenance of world peace. The commander-in-chief ordered the three armies to follow. Over the past 10 years, the Chinese military has become more active in organizing and participating in bilateral or multilateral joint training activities. As more and more Chinese soldiers go to the international training ground, records are constantly updated, and the Sino foreign joint training League has embarked on the track of institutionalization and normalization, continuously improving the quality and upgrading. The content elements are more and more comprehensive, and the partners are increasing. 17 in 2013, 24 in 2015 and more than 30 in 2018... From 2012 to before the COVID-19 epidemic swept the world, the Chinese army held more than 100 joint exercises and training activities with the armies of more than 30 countries. At the same time, the number of Chinese and foreign joint training leagues is increasing. The content of the training extends from anti-terrorism and disaster relief to peacekeeping, escort, medical service, security and special warfare. The training area extends from the periphery of China to the ocean. The participating forces expand from the army to the joint operations of the Navy, air force and the three services. The joint training objects expand from the neighboring countries to the countries in Europe, America, Africa and Oceania. The actual combat level is getting higher and higher, and the "sharpening stone" role of the joint performance and training League is becoming increasingly prominent. Over the past 10 years, the Chinese and foreign joint training leagues have focused more and more clearly on war preparation. In particular, the four strategic exercises "east-2018", "central-2019", "caucasus-2020" and "West · joint-2021" held from 2018 to 2021 have provided an important platform for improving the core military capabilities of our army. The "dongfang-2018" exercise tested the effectiveness of our army's reform and joint combat capability, and the "western · joint-2021" exercise tested the application of our army's new quality combat force. In the "western · united-2021" exercise, new equipment accounted for more than 80%, and air police-