In May of the first year of Shunzhi (1645), Azige, the British prince of the Manchu Qing Dynasty, annihilated Li Zicheng as the main force of the Great Shun Army in Jiugong Mountain, Hubei, and Li Zicheng himself was also killed in Jiugong Mountain, and the Qing court lifted the biggest enemy since entering the customs. In order to cooperate with the Prince of Yu Duoduo on the eastern front to attack the Hongguang regime of the Southern Ming Dynasty that occupied the south of the Yangtze River, Azig went east along the Yangtze River from Hubei to attack the Zuo Liangyu Corps of the Southern Ming in Hubei, Jiangxi and other places. In the face of the Qing army's southward movement, Zuo Liangyu was worried and died soon after, and his son Zuo Mengeng took over Zuo Liangyu's old department during his lifetime, totaling more than 200,000 people. Zuo Mengeng did not have the courage of his father, in the face of the aggressive Qing army, Zuo Mengeng simply led his troops to surrender to Azig directly in Jiujiang, and the last heavy army group in the Southern Ming Dynasty turned into the "leading party" of the Qing army.
After Azig received the Ming army under Zuo Mengeng, he reorganized it, and Jiangxi was still under the control of the Southern Ming Dynasty at that time, and Azig did not have the extra troops to attack Jiangxi. It happened that Jin Shenghuan, the general under Zuo Mengeng's command, volunteered to lead thousands of soldiers to attack Jiangxi for the Qing court, and Azig obeyed his proposal. Jin Shenghuan bluffed, threatening that the Qing army of more than 200,000 was about to attack Jiangxi, and those who descended quickly would be exempted from slaughtering the city, and sent an envoy to appease the Southern Ming army. Jin Shenghuan's intimidation tactics were very effective, the governor of Jiangxi in the Southern Ming Dynasty, Kuang Zhao, was so frightened that he directly abandoned the city and fled, and the Southern Ming army in Jiangxi also took the initiative to surrender to Jin Shenghuan, and Jin Shenghuan was able to capture the entire territory of Jiangxi without blood.
The occupation of Jiangxi was equivalent to gaining most of the southeastern region for the Qing court, and it could also cut off the connection between the anti-Qing forces in the southwest and southeast. Jin Shenghuan thought that with such a great merit, the Qing court would inevitably reward him greatly. In May of the third year of Shunzhi (1646), Jin Shenghuan was awarded the commander-in-chief of Jiangxi, and Zhang Yutian was appointed as the governor of Jiangxi to control Jin Shenghuan. Jin Shenghuan was very dissatisfied with the arrangements of the Qing court, and Zhang Yutian repeatedly asked Jin Shenghuan for bribes, and wrote to falsely accuse Jin Shenghuan of intending to rebel. Jin Shenghuan secretly contacted Nanming and planned to "anyway".
In the first month of the fifth year of Shunzhi (1648), Zhang Yutian suddenly led dozens of cavalry to Jin Shenghuan's garrison Ruizhou (now Gao'an). Jin Shenghuan shouted "Born as a Ming man, died as a Ming ghost", and the soldiers under his command all obeyed him, quickly captured Zhang Yutian, and then controlled Nanchang. Jin Shenghuan ordered to cut the braids and change clothes, and put up a list to calm the people, and the entire territory of Jiangxi except Ganzhou was controlled by Jin Shenghuan. Then, Jin Shenghuan sent people to Zhaoqing to contact the Yongli regime of the Southern Ming Dynasty, and the Yongli Emperor was very happy with Jin Shenghuan "anyway" and issued an edict to canonize him as the Duke of Yuguo.
After Jin Shenghuan "anyway", his command was known as 200,000 people, and Jiangnan was shaken. In February, Jin Shenghuan sent his general Wang Deren to capture Jiujiang, and there was a great tendency to go down the river east to take Nanjing. At that time, Ma Guozhu, the highest military and political governor of the Qing court in the south, Jiangnan, Jiangxi, and Henan, worriedly reported to the Qing court that Jin Shenghuan had "captured the county, plundered ships, and claimed that he would float the river to the east and watch over the south of the Yangtze River, so please send a large army as soon as possible in an attempt to extinguish it." After Jin Shenghuan "anyway", Guangdong Governor Li Chengdong also cited Guangdong as "anyway", and the anti-Qing forces in the middle and lower reaches of the Yangtze River responded one after another, and for a time the anti-Qing movement entered a "small climax." Jin Shenghuan's adviser Hu Tang also suggested that Jin Shenghuan take advantage of the Qing court's emptiness of troops in Jiangnan to take Nanjing directly.
"If you can take advantage of the momentum of breaking bamboo, serve under the banner of Qing soldiers, go down the river, and threaten to ask for help in Zhangfu Hospital, Jiangnan will open the door to accept the king, and its generals can be captured immediately. Then change the flag, sow the year number, sacrifice the mausoleum, Teng Shandong, the Central Plains will hear the wind response, the north and south of the river, the west and Shanxi, who has to be Qing also? ”
It is a pity that Jin Shenghuan did not adopt this strategic opinion, but turned south to attack Ganzhou, which is a "nail" between Jiangxi and Guangdong, and without Ganzhou, Jin Shenghuan will not be able to fight jointly with Li Chengdong. The Qing army stationed in Ganzhou also resisted to the death, and Jin Shenghuan attacked for more than 70 days in a row, but still did not resist. At the same time, the Qing court ordered Tan Tai to lead the army to conquer Jiangxi for the general of Zhengnan, and the Qing army quickly captured Jiujiang and approached the city of Nanchang. Jin Shenghuan had to give up attacking Ganzhou and return to Nanchang, and the Qing army in Ganzhou City took the opportunity to pursue Jin Shenghuan and beheaded thousands of people. In June, Jin Shenghuan withdrew to Nanchang, and the Qing army continued to besiege the city of Nanchang. On the nineteenth day of the first month of the sixth year of Shunzhi (1649), Tan Tai ordered a general attack on Nanchang, and with the blessing of the red-coated cannon, Nanchang quickly fell, Jin Shenghuan committed suicide by throwing himself into the water, and the Qing army re-pacified the whole territory of Jiangxi. In March of the same year, Emperor Yongli of the Southern Ming Dynasty posthumously presented Jin Shenghuan as the king of Nanchang, set up an altar to sacrifice him, and gave him loyalty.
Mr. Liu Yazi commented: "Although Jin (Jin Shenghuan) and Wang (Wang Deren) have repeatedly failed to praise and acted in a correct manner, they have raised troops anyway, and at the same time as Li Chengdong used Guangzhou to oppose the Qing Dynasty and restore the Ming Dynasty, the overall situation is quite shaken.