The Southern Song Dynasty regime, which was accustomed to partial security and flight, once again chose to flee south when facing the Iron Horse of the Mongols.
When the capital Lin'an was attacked by the Mongol army, the 5-year-old Southern Song Emperor Gongzong was captured, and the Southern Song Dynasty's lone ministers Lu Xiufu, Wen Tianxiang and Zhang Shijie successively supported two young emperors (Duanzong and Young Lord) and established a small imperial court. Just as Emperor Gaozong of song fled to the wealthy city of Lin'an in the face of the Jin Dynasty, Lu Xiufu and others fled with the young Song Duanzong to Quanzhou, Fujian Province, the richest city in the Southern Song Dynasty at that time.

According to the Song Shi Yingguo GongJi, "In the first month of the second year of Deyou (1276), 'Fengji Wang Yan was made the King of Yi, the ambassador of Fuzhou Fujian was pacified, the letter wang was made the king of Guang, and Quanzhou was sentenced to the official affairs of Nanwaizong'. "At that time, the entire Southern Song Dynasty was only left with only the southeast coastal area in its own hands, compared with Guangdong, Fujian at that time was the richest place in the country." Coupled with the mountainous terrain of Fujian, it was able to make full use of the advantages of the terrain to resist the Mongol cavalry. Therefore, as early as a few years before the Mongol army captured Lin'an, the Southern Song Dynasty royal family began to prepare for the relocation of all members to Fujian. Unfortunately, when Lin'an was breached, when the young Song Duanzong came to Quanzhou, he was confronted by Pu Shougeng, a Hui merchant who was ready to defect.
According to the "Song Shi Yingguo GongJi", "If you want to enter Quanzhou, you will have different aspirations to appease Pu Shou Geng. In the beginning, Shou Geng raised the Quanzhou Shipping Division, and was good at the profiteers for thirty years. Boat to the spring, Shou Geng to the guru, please stop, Zhang Shijie can not. Or persuade Shi Jie to stay in Shou Geng, then Van Hai Gang will not let himself go. Shi Jie did not follow, and returned to it. Then the boat is insufficient, but it plunders its boat, and it has no treasure. Shou Geng was the one who angrily killed the clan chambers and the scholars and soldiers in the spring, and moved to Chaozhou... In December, Shou Geng and Zhizhou Tian Makoto surrendered to the city. "
According to this record, it is not difficult to see that in the last years of the Southern Song Dynasty, as the most powerful Hui merchant in Quanzhou City, for their own interests, they did not hesitate to harm the Southern Song Clan who had the grace to support themselves. At that time, after the Mongol army attacked Lin'an, Song Gongzong was captured, and Zhao Yan, who was far away in Fuzhou, was immediately supported as emperor, and was known as "Song Duanzong". However, the Mongol iron horse soon also chased after Fuzhou, and Song Duanzong was taken by sea ship to the port of Quanzhou at that time.
As the envoy of Quanzhou City in the Southern Song Dynasty, Pu Shougeng, relying on the power given by the Southern Song Government, had already accumulated a large amount of wealth that was invincible to the country. At this time, Pu Shougeng became the actual controller of Quanzhou City at that time. In the face of Song Duanzong, Pu Shougeng did not show much welcome, but only settled Song Duanzong in the Donghai Fashi Temple outside Quanzhou.
When Song Duanzong and others could not enter the city, Pu Shougeng communicated with the Mongol envoys who had been in contact with him earlier, and finally decided to remain neutral first, not to help accept the Song army, nor to help the Yuan army. However, at that time, Zhang Shijie ordered the plundering in order to raise the military ships and salaries that fled south
Pu Shou Geng docked at the merchant ships around The Fashi and appropriated these merchant ships and the goods on them for themselves. It was this move that completely angered Pu Shougeng, who was born as a businessman.
Pu Shougeng, who was himself a descendant of the Semu (Arab) merchants, naturally did not receive the influence of Confucian culture. In their values, they do not know what it is to be loyal to the king and serve the country, coupled with the origin of the businessman, facing the damage of their own interests. Pu Shou Geng's thoughts were not that he was helping the monarch, but that his own interests were damaged and that he must take revenge on Xue Hate.
Because he could not catch up with Song Duanzong, Zhang Shijie, and others who fled south, Pu Shougeng attacked the sons of the Southern Song Dynasty clan living in Quanzhou City, and Shi Zai said: "He was angry and killed the clansmen and the scholars and soldiers in Quanquan." According to statistics, in this massacre, more than 3,000 descendants of the Southern Song Dynasty clan and the Huai army died under the knife of Pu Shou Geng. After the massacre, Pu Shougeng, on the one hand, out of hatred, and on the other hand, wanted to strive for political interests in the nascent Yuan dynasty regime, so he rebelled against Song Shiyuan and sacrificed the city to lower the Yuan.
On the eighth day of December in the second year of Deyou, the Yuan soldiers arrived in Quanzhou from Zhejiang, and Pu Shou Geng and Sima Tian Zhenzi of the prefecture sacrificed the city to the Yuan. After Pu Shougeng surrendered to Yuan, he surrendered his own haigang to the Yuan army to attack the remnants of the Song division. When the Yuan general Dong Wenbing arrived at Quanquan with his troops, he gave Pu Shougeng the Golden Tiger Charm. Soon after, the Yuan court appointed Pu Shou Geng as the general of Zhaoyong, the governor of Fujian and Guangdong, and the envoy of Guangdong City, Fujian.
After being reused by the Yuan Dynasty, Pu ShouGeng began to actively assist the Yuan court in attacking and co-opting the anti-Yuan Southern Song forces. For those Southern Song soldiers and civilians who refused to surrender, Pu ShouGeng used his own sea vessels to track down the attack. Those Southern Song dynasty soldiers and civilians who were not firm in their will to oppose it chose to win over. For example, zhuang mishao of the former Ji'an Zhizhou and Langzhong Zhuang Mi of the former Punishment Department were elected as Zhaoqing Road Zhizhong and Guangzhou Luzhizhong respectively; those sons of the Song Dynasty who were spared for reasons were later no longer prosecuted, and even appointed as officials.
It was precisely because Pu Shou Geng refused to allow Song Duanzong to enter the city that the Southern Song Dynasty monarchs finally had to flee to the desolate cliff mountain and martyr the country as a last resort, and it was Pu Shou Geng's soft and hard means that crushed the last anti-Yuan forces of the Southern Song Dynasty. It can be said that the descendants of this Semu (Arab) merchant became the last straw that crushed the Southern Song Dynasty regime because of his deeds.