they reached Han (漢; in present-day Mian County, Shaanxi) and Yue (樂; in present-day Chenggu County, Shaanxi) counties, which served as bait to wear out the enemy. However, Zhong Hui sent two smaller detachments to attack the two counties and led the main Wei army further into Shu territory. In the meantime, Jiang Wei lost to the Wei generals Wang Qi (王欣) and Yang Xin (楊欣) and had to retreat to the highly fortified mountain pass at Jiange (劍閣; in present-day Jiange County, Sichuan). Upon learning that Jiang Wei's plan had failed and sown the seeds of destruction, Zhuge Zhan hastily assembled an army in Chengdu and moved to Fu County to prepare for a final defence. Battles with Deng Ai, and death The aforementioned military movements happened within weeks, and Zhong Hui's rapid advance shocked most of the Shu generals. As they realised the danger of letting the enemy in, Jiang Wei and his comrades were still stuck at Jiange. As he knew that Jiange was well-defended, Zhuge Zhan did not send reinforcements there and instead held his position in Fu County. When the Wei general Deng Ai suddenly appeared in Jiangyou (江由) with his troops after taking a dangerous shortcut across mountainous terrain, the official in charge of Jiangyou surrendered without putting up a fight. Huang Chong, a son of Huang Quan, had urged Zhuge Zhan on numerous occasions to move quickly and seize control of advantageous terrain before Deng Ai did. Zhuge Zhan, however, deemed Huang Chong's plan too ambitious and adopted a more "cautious" approach instead. When Huang Chong repeatedly urged him to attack Deng Ai, Zhuge Zhan relented and tentatively sent a vanguard force to attack the enemy, which defeated them. Zhuge Zhan then left Fu County for the better fortified Mianzhu, where he planned to make a last stand against Deng Ai. When Deng Ai besieged Zhuge Zhan at Mianzhu, he offered the latter a chance to surrender and promised to recommend to the Wei government to enfeoff Zhuge Zhan as the Prince of Langye if he surrendered. However, Zhuge Zhan refused, had Deng Ai's messenger executed, and ordered his troops to prepare for battle outside the pass. He supposedly arranged his troops in the Eight Trigrams Formation invented by his father. At the time, there were other notable Shu figures with Zhuge Zhan at Mianzhu, including Zhang Zun (張遵; a grandson of Zhang