major reasons behind this was that Emperor Gaozong and the chancellor Qin Hui did not want the Song army to defeat the Jurchens and destroy the Jin Dynasty, as this might result in Gaozong's half-brother - the last emperor of the Northern Song Dynasty, Emperor Qinzong, who was living in Jin-imposed exile in Manchuria - being recalled to the throne. If this happened, Gaozong would lose power. At the time, Yue Fei and Han Shizhong were preparing to attack Kaifeng and recapture it. Fearing that a victory at Kaifeng might cause the Jurchens to release Emperor Qinzong, Emperor Gaozong followed their advice, sending 12 orders back in the form of 12 gold plaques to Yue Fei, recalling him to the capital. There, Yue Fei said, in tears, "Thirty years of effort now is wasted." Emperor Gaozong also recalled every soldier under threats to kill their families. After Yue Fei's return to the capital, Emperor Gaozong and Qin Hui imprisoned him on a trumped-up charge under "groundless" () and had him put to death. Han Shizhong was also dismissed from his military duties. On October 11, 1142, the Song and Jin empires signed the Treaty of Shaoxing, which recognised the Jurchens' claims to the former Song territories they had already conquered. This meant that Emperor Gaozong had to give up all land north of the Huai River, in exchange for peace between the two empires. Aside from two incidents, this peace would last for seventy years. The Song also had to pay a yearly tribute of 250,000 taels of silver and 250,000 packs of silk to the Jin. The negotiation allowed the emperor's mother and other selected members of the imperial clan (including a woman claimed to be his half-sister Princess Roufu (Zhao Duofu), whom he later sentenced to death under suspicion of impersonating an imperial princess) to return to Song; Empress Wei was then named Empress Dowager in Southern Song. However, the treaty designated the Song as the "insignificant state", while the Jin was recognized as the "superior state". People would later blame the emperor for Yue Fei's death and vilify him as a hypocritical tyrant. However, although the treaty's terms resulted in Song becoming a vassal state to the Jin, it saved Song's economy: since the dynasty's founding, the regime had lost more capital on military defenses than on annual payments to their neighbors, about three-quarters of state revenue.