Sun Sheng (孫晟) (died December 21, 956), né Sun Feng (孫鳳), known as Sun Ji (孫忌) at one point, formally Duke Wenzhong of Lu (魯文忠公), was an official of the Chinese Five Dynasties and Ten Kingdoms Period states Later Tang, Wu, and Southern Tang, serving as a chancellor during the reign of Southern Tang's second emperor Li Jing. When the Southern Tang came under attack by its northern neighbor Later Zhou, Li Jing sent him as an emissary to Later Zhou to try to persuade Later Zhou's emperor Guo Rong to end his campaign, but Guo, after being unable to get Sun to give him secrets of the Southern Tang state, executed him.
It is not known when Sun Sheng was born (under the name of Sun Feng), but it is known that he was from Gaomi. He was also known as Sun Ji at one point, but later came to be named Sun Sheng. In his young days, he was said to be studious and capable of writing, particularly at poetry.
Also, during his youth, Sun passed the imperial examinations in the Jinshi class. (It is unclear whether this was in the late Tang dynasty or early in its successor state Later Liang.) At that time, however, the intelligentsia at then-capital Luoyang favored men who paid attention to details and appearance, and Sun did not pay attention to such things, and therefore was not regarded highly. He thus left the capital scene and journeyed to Mount Lu to become a Taoist monk at Jianji Temple (簡寂宮). However, his custom of hanging up a portrait of the Tang poet Jia Dao and offering sacrifices to the portrait caused fellow monks to believe that he was a sorcerer, and they chased him out of the temple. He then changed back into the robes of a scholar, and went north to Later Liang's northern rival Jin, meeting Jin's prince Li Cunxu at Zhen Prefecture (鎮州, in modern Shijiazhuang, Hebei), although it was not stated whether Li gave him any positions in the government at that time.
In 923, Li Cunxu claimed imperial title of a new Later Tang, and shortly after destroyed Later Liang and took over its territory. One of the chancellors he commissioned for his new imperial government was Doulu Ge. Doulu had long known of Sun Sheng's capability, and he retained Sun to serve as a secretary to him, and Sun later received the title of Zhuzuo Zuolang (著作佐郎), as an assistant editor at the Palace Library.
As of 927, by which time Li Cunxu had died and been succeeded by his adoptive brother Li Siyuan as emperor, Sun was serving as a secretary to Zhu Shouyin the military governor (Jiedushi) of Xuanwu Circuit (宣武, headquartered in modern Kaifeng, Henan). In winter 927, Li Siyuan suddenly announced that he was going to visit Xuanwu's capital Bian Prefecture (汴州) from the imperial capital Luoyang, leading to two rumors — either that he was intending to launch a major attack on Later Tang's southeastern neighbor Wu, or that he was going to act against one of the rebellious governors to the east. Sun suggested to Zhu that he resist the emperor, and Zhu agreed, closing the city and preparing to defend it. However, Li Siyuan's generals Fan Yanguang and Shi Jingtang quickly arrived at Bian before its defenses could be fully ready and began the siege, and when Li Siyuan himself shortly arrived thereafter and continued the siege in earnest, the people of Bian began to desert Zhu in droves. Zhu committed suicide.
Sun, meanwhile, abandoned his wife and children, and hid himself in the region. Li Siyuan's chief of staff An Chonghui hated him for encouraging Zhu's rebellion, and therefore put out reward posters for his arrest, but could not have him arrested, and therefore slaughtered his family. Sun fled to Zhengyang (正陽, on the border of modern Fuyang and Lu'an, Anhui), on the border between Later Tang and Wu. Before he could cross the Huai River into Wu territory, however, he was intercepted by suspicious Later Tang border guards. He sat on the bank of the Huai and acted crazy by grabbing his clothes and eating the fleas thereon, so the guards ignored him. He thereafter crossed the river into Wu territory.
Upon entering Wu territory, Sun Sheng was taken in by the Wu military governor of Fengguo Circuit (奉國, headquartered in modern Lu'an), Liu Jin (劉金). For reasons not explained in history, Sun pretended to be unable to speak when Liu spoke with him. However, one day, when Sun went to pray at the temple of the Han dynasty prince Liu An, Liu Jin had someone hide under Liu An's statue to listen to Sun's prayers, and therefore found out more about him. Liu Jin thereafter had him delivered to Jinling, where the headquarters of the Wu regent Xu Zhigao was.
At that time, Xu was trying to gather all kinds of talented people to serve on his staff and was glad to have Sun added to his staff. It was said that Sun spoke with a stutter, but once he had a chance to talk with people further, he communicated effectively and persuasively. Xu favored him greatly and had him be in charge of drafting Xu's orders. Xu also consulted him secretly on Xu's plans to eventually take over the Wu throne, and each time they spoke, they spoke for over two hours, but Sun was able to keep secrets and not reveal what Xu was talking with him about. In 932, when Xu established a Lixian Hall at his headquarters with collections of books, where he would often spoke with his advisors, Sun and Chen Jue were frequent visitors to the hall.
In 937, Wu's final emperor Yang Pu yielded the throne to Xu Zhigao, ending Wu. Xu Zhigao took the throne as emperor of a new state of Southern Tang, and shortly after changed his last name back to his birth last name of Li while taking a new personal name of Bian. During Li Bian's reign as emperor, Sun Sheng successively served as Zhongshu Sheren (中書舍人, a mid-level official at the legislative bureau of government (中書省, Zhongshu Sheng)), imperial scholar (翰林學士, Hanlin Xueshi), and Zhongshu Shilang (中書侍郎, deputy head of the legislative bureau). There was a time when the official Feng Yanji, a close associate of Li Bian's oldest son and heir presumptive Li Jing the Prince of Qi, joked with Sun, "What abilities do you have, Lord, that you get to be Zhongshu Shilang?" Sun, who had long despised Feng, responded:
I, Sun Sheng, am only a foolish scholar from east of the Taihang Mountains. My writing is not as good as yours, Lord. My humor is not as good as yours, Lord. My trickery is not as good as yours, Lord. But the Master made you, Lord, a friend to the Prince of Qi in order to ask you to guide him with kindness and righteousness, not to spend time in entertainment and games with him. Even though I am not capable, your capabilities are enough to bring the state into danger.
When Li Bian fell ill and then shortly after died in 943, Sun was concerned that Feng and his associates would become powerful, and therefore considered claiming that Li Bian left a will naming his wife Empress Song regent over the new emperor Li Jing. However, when the imperial scholar Li Yiye (李貽業) objected, pointing out that LI Bian himself had often spoken against the idea of female regents and that it would be unnatural for Li Jing, well into his adulthood, to have a regent in any case — going as far as stating that if the emperor will were published with the directions to name Empress Song regent that he would publicly tear the edict apart — Sun relented and did not forge such a will. Li Jing shortly after took the throne as the new emperor.
After Li Jing took the throne, at the urging of his younger brother Li Jingda (李景達), who apparently did not like Sun Sheng, Sun was sent away from the imperial administration to serve as the military governor of Yongtai Circuit (永泰, headquartered in modern Anqing, Anhui). It was said that Sun governed the circuit's army with strict discipline. In 944, when the official Xiao Yan (蕭儼) offended Li Jing by comparing his palace to that of the Chen dynasty's last emperor Chen Shubao, Li Jing had Xiao exiled to Yongtai's capital Shu Prefecture (舒州). Sun subsequently sent guards to put Xiao under strict guard. Xiao met him and rebuked him for doing so, while pointing out that Sun himself had nearly disrupted the proper imperial succession. Sun, humbled, withdrew the guards. At one point, two soldiers at Yongtai, apparently resenting Sun for his discipline, entered headquarters and wanted to assassinate Sun. However, Sun happened to be not at the headquarters at that time, so they assassinated the officer Li Jianchong (李建崇) and then escaped. As a result of this incident, Sun was demoted to be the minister of palace supplies (光祿卿, Guanglu Qing). However, Li Jing, who had respected Sun, did not further punish him, and later made him You Puye (右僕射, one of the heads of the executive bureau (尚書省, Shangshu Sheng)).