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Stone Sentinel Maze
Traditional Chinese 八陣圖
Simplified Chinese 八阵图
Alternative Chinese name
Traditional Chinese 石兵八陣
Simplified Chinese 石兵八阵

The Stone Sentinel Maze was an array of rocks and boulders thought to be conjured by Zhuge Liang based on the concept of the bagua. The formation was located on Yufu Shore (魚腹浦) by the Yangtze River near present-day Baidicheng, Chongqing, China, where supposed ruins of the array exist. In folklore, when the Yangtze River rises in summer, the formation is submerged, but in autumn, the array resurfaces, with the rocks and boulders still left intact in their original positions.

Lu Xun's encounter

The Stone Sentinel Maze was mentioned in Chapter 84 of the historical novel Romance of the Three Kingdoms by Luo Guanzhong.

Liu Bei was defeated by Lu Xun at the Battle of Xiaoting and fled towards Baidicheng with Lu Xun in hot pursuit. When Lu Xun arrived at Yufu Shore by the Yangtze River near Baidicheng, he felt a strong enemy presence and cautioned his troops of a possible ambush. He sent men to scout ahead, who reported that the area was deserted except for some scattered piles of rocks. Bewildered, Lu Xun asked a local, who told him that qi started emerging from the area after Zhuge Liang arranged the rocks there when he first entered Sichuan.

Lu Xun personally inspected the area and believed that the "maze" was only a petty display of deception, so he led a few men inside. Just as he was about to leave, a strong gust of wind blew. Dust storms overshadowed the sky and the rocks seemed like swords, mountainous piles of dirt emerged while the river waves sounded like an attacking army. Lu Xun exclaimed, "I have fallen into Zhuge Liang's trap!", and attempted to escape from the maze but to no avail.

Suddenly, Lu Xun saw an old man, who offered him assistance in exiting the labyrinth. Lu Xun followed him and got out of the maze unharmed. The old man identified himself as Huang Chengyan, Zhuge Liang's father-in-law. He explained to Lu Xun that the maze was constructed based on the ba gua concept. Huang Chengyan also told Lu Xun that Zhuge Liang had predicted that a Wu general would chance upon the maze when he first built it, and had asked him not to lead the general out when he fell into the trap. Lu Xun dismounted and thanked Huang Chengyan. When he returned to camp, he exclaimed that he was inferior to Zhuge Liang in terms of intelligence. He then made plans to return to Eastern Wu because he feared that their rival state Cao Wei might take advantage of the situation to attack Wu.


No documentation of this event is found in Records of the Three Kingdoms, the authoritative historical text for the history of the Three Kingdoms period. It was mentioned in Lu Xun's biography that after Liu Bei retreated to Baidicheng, the Wu generals Xu Sheng, Pan Zhang, Song Qian and others felt that Liu Bei was within reach and they could capture him, so they kept making requests to Sun Quan to allow them to attack Baidicheng. Sun Quan asked Lu Xun for his opinion, and Lu Xun, along with Zhu Ran and Luo Tong, gave their response, "Cao Pi has thousands of troops. He pretends to agree to help us attack (Liu) Bei, but he has other motives. Please make the decision to return (to Wu) soon." Not long later, as Lu Xun expected, Cao Wei forces came to attack Eastern Wu from three directions, which would trigger a series of battles between Wei and Wu between 222 and 225.

Zhang Xianzhong's encounter

During the late Ming Dynasty, the rebel leader Zhang Xianzhong stumbled across the maze while he was fleeing from the imperial army in Chengdu. Through the guidance of an old man, Zhang Xianzhong led his troops into the maze and out. The pursuing imperial forces charged into the array. Suddenly, mist shrouded the area and the piles of dirt appeared to be hills and valleys. The imperial soldiers exhausted themselves over the night by attempting to escape but only at daybreak did they realize that they were actually charging at piles of dirt.

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