governor of Yicheng Circuit (義成, headquartered in modern Anyang, Henan). In 940, he was given the honorary title of acting Taifu () and transferred to Baoyi Circuit (保義, headquartered in modern Sanmenxia, i.e., the same circuit formerly known as Zhenguo during Later Liang). In 941, he was recalled to serve as the disciplinary officer for the imperial guards. He was also made the military governor of Heyang Circuit (河陽, headquartered in modern Jiaozuo, Henan). In 942, Shi Jingtang fell deathly ill. He initially entrusted his young (and only surviving) son Shi Chongrui () to the senior chancellor Feng Dao, intending that Feng support Shi Chongrui in succeeding to the throne. However, after Shi Jingtang died shortly after, Feng discussed the matter with Jing, and they decided that as the realm was troubled at the time, the state needed an older emperor. They thus supported Shi Jingtang's biological nephew and adoptive son Shi Chonggui the Prince of Qi as emperor. During Shi Chonggui's reign Chancellorship It was said that Jing Yanguang considered Shi Chonggui's ascension to the throne to be his doing, and used that to become involved in the key decisions in Shi's administration. Shortly after Shi took the throne, he was made the commander of the imperial guards, as well as chancellor (with the designation Tong Zhongshu Menxia Pingzhangshi (). He was also apparently given the military governorship of Tianping Circuit (天平, headquartered in modern Tai'an, Shandong), but remained at Daliang. One of the immediate diplomatic decisions was how Shi Jingtang's death and Shi Chonggui's ascension was to be reported to Khitan (which has renamed itself Liao by this point). Most officials suggested submitting a report to Emperor Taizong and having Shi Chonggui refer to himself as "your subject" in the report, to show submission. Jing, however, advocated a letter (to show equality between the states) and having Shi Chonggui refer to himself as "your grandson" and not "subject." (The reference to being "grandson" was based on the fact that Shi Jingtang referred to himself as "your son" when corresponding with Emperor Taizong). Fellow chancellor Li Song argued that Jing's suggestion would eventually lead to war, but Jing insisted. With Feng neither agreeing nor disagreeing with Jing, Shi Chonggui accepted Jing's proposal. This caused Emperor Taizong to be angered. He sent an emissary rebuking Shi Chonggui for taking the throne without first seeking his approval. Jing wrote back an