Sun came into contact with western priests and western learning because of his teacher Xu Guangqi. After Xu Guangqi converted to Christianity, he confirmed that Catholicism could "supplement the kingly way, influence Confucianism and save the Orthodox Church" and was baptized in Beijing in the first year of the Apocalypse (162 1), that is, foreign priests were invited to preach in Jiading, his hometown, thus making Jiading one of the centers of Catholic activities in China.
In the second year of the Apocalypse (1622), the defense of Liao province was tight, and Sun proposed two strategies to the court, namely, preparing for Beijing and guarding the border, which was valued by the court. Sun Chengzong, minister of the Ministry of War, Ren Jiliao's general plan for running the army. Sun Jiantai made guns, Jianning Yuancheng, and Sun was in charge. (Biography of Sun Chengzong in Ming Dynasty) Later, Hou Zhenyu sponsored him to join the army in Liaodong and cooperated with Yuan Chonghuan in Ningyuan, which helped Yuan Chonghuan and others a lot. Yuan Chonghuan is known as "two talents with knowledge and wisdom". The following year, Sun helped Yuan Chonghuan keep Ningyuan. In the sixth year of the apocalypse, Nurhachi led 60,000 troops to storm Ningyuan, claiming to be 200,000. Ming army Chengtou equipment 1 1 cannon, its power is amazing. Nurhachi was seriously injured and died seven months later. The history is called "Ningyuan triumphs". Facts have proved that building a platform to make guns is the best strategy to resist gold.
Due to the autocratic power of traitor Wei Zhongxian, Yuan Chonghuan was forced to retire, and Sun was also dismissed from office and returned to his hometown.
In the first year of Chongzhen (1628), Chongzhen succeeded to the throne, so Wei Zhongxian and Yuan Chonghuan came back and named Sun Zan the military affairs of Liao Province. In the second year, the nomads from Beijing, chongzhen suspicious of huang taiji's machinations, killed Yuan Chonghuan for no reason. In the predicament of being isolated in the Shanhaiguan Pass, Sun United with the soldiers and, with the help of western artillery, stood firm in the 24 th Fort of Eight Cities (the records and people of Jiading County in Guangxu).
Sun believes that Quang Ninh is the frontier position against gold, and it is gradually advancing. The Ming court did not adopt its correct proposition. In January of the third year of Chongzhen, Sun Yuanhua followed Sun Chengzong to guard Shanhaiguan, and in March, he added Shandong inspector. In May, Liang Tingdong, the minister of the Ministry of War, recommended Sun to be promoted to Dengfeng and Governor of Laizhou. Sun recruited western talents in Dengzhou, boldly recruited talents, and formed a foreign legion with 27 Europeans, making Dengzhou a "fortress for the spread of western learning to the east" (Traffic History of China and the West in Fang Hao). After Yuan Chonghuan killed Mao, the old generals of Pidao mutinied, and the Governor Sun received Pidao rebels Kong Youde, Geng and others. Kong Youde was appointed as a cavalry officer and Geng was sent to Dengzhou fortress.
In August of the fourth year of Chongzhen (163 1), Huang taiji led the Qing army to attack the Daling River (now Jinxian County, Liaoning Province), and Zu Dashou besieged the city, with no food. Sun was ordered to send troops to help. Sun cried, and Liao people lived in Shandong to escape the war1100,000 people. Sun thought that the Liao people were available and reused a number of Liao generals. Today, he is going to help Liao Province. He urgently ordered Kong Youde to ride to the front to reinforce. However, the Liaodong soldiers in Dengzhou were at odds with the Shandong soldiers. When Kong Youde arrived at Wuqiao, the soldiers robbed and defected because of the heavy rain in Chun Xue. Kong Youde was instigated by Li Yingyuan, the son of Mao's former headquarters, to launch a rebellion in Wuqiao, which was called "Wuqiao mutiny" in history. After Kong Youde defected to Shandong Peninsula, he successively captured Linyi, Lingxian, Shanghe and Qingcheng, and led the troops to Dengzhou. Sun gave an urgent order to lead the Liao troops to guard the city outside Dengzhou, and he sent his troops to attack the company commander Zhang Keda, and the two roads became a converging attack. But Zhang Dao and Kong Youde knew each other, and Zhang Dao's team immediately joined Kong Youde's team, while Zhang Ke was defeated. Deng Genghe is an old friend of Kong Youde. They opened the door with torches to respond. In the fifth year of Chongzhen (1632), Dengzhou fell. Zhang Keda, the company commander, committed suicide. Sun was defeated and attempted suicide, and was captured by the rebels. While in prison, Sun was interested in Kong Youde and other rebel troops, and he knew his great sense of justice. Kong Youde woke up and begged for mercy. The court also agreed to sue Sun for sin, but Wang Daochun hid the imperial edict, and the rebels made peace for a long time, which led to chaos. Sun persuaded the rebels to return to North Korea and tell the truth. After Sun returned to Beijing, Wang Daochun attacked the insurgents, causing the insurgents to attack Laizhou again and again, and the chaos expanded. After the mutiny, North Korea repeatedly said that Sun turned against his enemies. In March, Sun,, and others were arrested in the town, framed by political enemies Yu,, and Lu Zhenfei, and severely punished in prison. At this point, Sun finally argued and was sentenced to death by Chongzhen as the culprit. Records of Zhou Yanru wanted to escape the death penalty and turned to Xu Guangqi for help, but it could not be redeemed. (History of the Ming Dynasty, Volume 248) Finally, Song, Zhou and others sent troops to compete for the deer. On July 23rd, the fifth year of Chongzhen (1September 7th, 632), Sun and Zhang Daotong were executed. Sun was beheaded in Beijing at the age of 5 1.
His wrongful death was written by his son Sun Hedou into the book A Record of Wronged Cases of Ethnic Compatriots. The body was greeted by his son and his men and buried in the wasteland outside the south gate of Jiading. There is a stone tablet in front of the tomb, which reads "Tomb of Wudu Yushi Sun". Before Sun died, he disguised himself as a charcoal worker and went to visit him in prison to make his last confession. Sun Yuan Hua is a Catholic, and his holy name is ignacio. He paid attention to western science all his life and was an expert in western artillery. After Sun's death, representatives of western military experts faded out of the Ming army. He has three sons: Sun Heding, Sun Hedou and Sun Hejing. Sun Hedou repeatedly declined the recommendation of his father's subordinates and refused to be an official. He devoted himself to sorting out his father's manuscripts and compiled the Collection of Water People.
In Sun's short life, two things influenced history. Once artillery is used to serve the country, it will help Liao defense in the near future and benefit the spread of western learning in the long run. Second, teach Jiading. These two events are related to the arrival of the eastern priests and the spread of western learning to the east.