Because of the popularity of TV series such as Kangxi Dynasty, Hangar Dan in Junggar, Mongolia is also a household name. Some fabricated plots in TV series make some people mistakenly think that Junggar Khan will never recover after Galdin's death. This is by no means true. Junggar was originally a branch of Weilat Mongolia, also known as Wala in the Ming Dynasty. Junggar, Hu Shuo Bout, Tulhut Bout, Durbert Bout and Whit Bout belong to Moxi Mongolia, which is a relatively loose alliance, in which Hu Shuo Bout has occupied a leading position for a long time. Galdin's ancestor was the famous leader of the Walla Department, who had captured Ming Yingzong in the Battle of the Civil Fort. Gordan himself is ambitious and bent on restoring the glory of Mongolian ancestors. He first unified the Mongolian ministries in the west of the desert, and then expanded eastward, interfering in the internal affairs of Khalkha Mongolia on the pretext of forcing it to be attacked on both sides (Russia in the North War) with nowhere to go. In the Qing Dynasty, galdan's behavior was tantamount to rebellion. On the one hand, in the late Jin Dynasty, Khan, the leader of the Weilat Department, voluntarily surrendered to the Qing Dynasty. On the other hand, with the invasion of Junggar, the border stability of the Qing Dynasty was greatly tested. The Qing army defeated the main force of Galdin in the Battle of Ulan Butong and the Battle of Zhaomodo. At this time, contradictions within Junggar began to break out. Goldan's nephew Alabo Tan formed an alliance against Goldan and blocked Goldan's westward journey. In the thirty-sixth year of Kangxi, galdan, who was in a dilemma, died in Cobdo, and Alabotan, who made a mistake, successfully ascended the position of Great Khan in Junggar and occupied the hometown of Junggar. When it comes to governing the country, Alabotham is definitely a good hand. He changed Galdin's attachment to Russia before, and faced with Russia's constant invasion and harassment, Alabotham dared to besiege the Russian fortress with troops in the Battle of Yamesh Lake. Not only did he acquire a large number of weapons and equipment, but more importantly, he had professional artillery talents among the prisoners. With the help of these people, the Junggar army was equipped with advanced artillery and its strength was enhanced. With the development of national strength, the contradiction between Junggar and Qing Dynasty became more and more serious. There is constant friction between the two sides in Xinjiang. At the end of Kangxi, the Qing Dynasty also sent troops to counter-insurgency several times. In the fifth year of Yongzheng, Alabo died of illness, and his son Galdin succeeded to the throne in zero years. Yongzheng thought that the time had come, so he assembled the Eight Banners in Beijing camp and Fengtian, worshipped Fu Erdan as the general of Jingbian, and appointed Yue Zhongqi as the general of Ningyuan to command the Han camp and go to the northwest again. Yong Zhengdi attached great importance to this expedition, personally told the ancestral temple and told the ancestors that this war would pacify the scourge of the West in one fell swoop, but he didn't want the army to suffer a fiasco. The Battle of Tongbo was the worst defeat in the history of Manchu-Mongolian War. The Qing army was killed in the battle and captured more than 7000 officers and men. At that time, only 2,000 of the 6,000 Eight Banners soldiers recruited in the capital escaped, and the number of Qing generals was 18. In the end, only four people, including coach Fu Erdan, survived. Yong Zhengdi's long-cherished wish to expel Junggar was not realized until his son Qianlong period. Because of the plague of civil strife in Junggar, the national strength was greatly reduced, and Qianlong finally had the opportunity to completely pacify Junggar. In the twenty-five years of Qianlong, the Junggar khanate, which had flourished against the Qing Dynasty for nearly a hundred years, was completely destroyed. In fact, after Galdin's death, Junggar Khanate still existed for more than 60 years and experienced its heyday.