陳泰
As the siege of Didao continued, the supply problem begun to take its toll on the overstretched Shu force, and there was more bad news for Jiang Wei. The news of Wei reinforcements arrived from Jincheng on the upstream of the Tao River, while at the same time, Chen Tai's reinforcements bypassed Gaocheng Ridge (高城嶺; located northwest of present-day Weiyuan County, Gansu), and took up positions in the mountains to the southeast of the besieged Didao. After several failed attempts attacking the mountain ridge, it was obvious to Shu commanders that their hungry soldiers could not dislodge the Wei reinforcements. The reinforcements in the mountains just outside the city wall established a link with the city by means of smoke and drums, and the defenders' morale was greatly boosted. Chen Tai was well aware that despite the numerical advantage and newly boosted morale, the Wei force was not in a position to counterattack. Instead, Chen Tai deployed a clever tactic by releasing news of a planned counteroffensive in which the Wei force would attack the Shu force from both sides. With supplies running out, Jiang Wei was forced to concede defeat by retreating to Zhongti (鐘堤; located south of present-day Lintao County, Gansu) at the downstream of the Tao River, to the south of Didao. The battle therefore was concluded with a Wei victory. As Wang Jing opened the city gate to welcome Chen Tai, he cordially thanked the latter, revealing that he only had enough food for ten more days of siege, and the city would definitely fall if the reinforcements had failed to arrive in time. After re-supplying the city and reorganising the defence, Chen Tai and his force returned to Shanggui.