Emperor Jiajing is fatuous, and Yong Zhengdi is diligent and loves the people. Why is their posthumous title Sejong?

Temple names originated in Shang Dynasty, but it was not until Han Dynasty that the use of temple names was very strict. Many emperors were not qualified without temple names. By the time of Cao Wei, all kinds of emperors began to call themselves ancestors, but later their temple names were cancelled by later emperors, who thought they were not worthy. Like those emperors with bigger farts in the Sixteen Kingdoms period, not to mention the temple number, even their status as emperors was not recognized. In the Tang Dynasty, the imperial power was strengthened, so except for a few extinct monarchs, there were temple names, even in places like Karachitan, Xixia and North Korea, their monarchs also had temple names. Sejong is generally the temple name of your Lord. Emperors like this have made great contributions to the development of the dynasty. Such as Liu Che, Emperor Wu of the Han Dynasty, and Chai Rong, Zhou Shizong. Of course, the imperial power of the Ming and Qing Dynasties was far stronger than that of the previous dynasties, so an emperor like Jiajing who only played politics without making contributions could also be involved in the achievements of Emperor Wu of the Han Dynasty and Zhou Shizong, which was really not worthy of the name. As for Yong Zhengdi, his material ability is actually very good, at least much better than his son Gan Long and his grandfather the emperor shunzhi. Sejong's temple deserves its name ~