Lu Xun didn't break the Eight Arrays. Although Lu Xun is powerful, he still doesn't have the ability to break the Eight Arrays. It's lucky to get out of it alive.
Zhuge Liang, nicknamed Mr. Wolong, was the prime minister of Shu and Han in the Three Kingdoms period at the end of the Eastern Han Dynasty. When Liu Bei lived in Jingzhou, he invited Zhuge Liang with the courtesy of three considerations. With Zhuge Liang's assistance, it took Liu Bei only ten years to go from a wandering general with no place to the founding king of Shu Han. Later, regardless of Zhuge Liang's persuasion, Liu Bei insisted on waging a war against Wu in order to avenge his righteous brother Guan Yu. Eventually, Lu Xun, a scholar of Soochow, defeated him with a fire in Yiling and fled in a mess. If Zhuge Liang had not arranged an eight-array plan in advance to block Lu Xun's pursuers, Liu Bei might have gone to see Guan Yu and Zhang Fei early.
Lu Xun, whose name is Bo Yan, was the last of the four governors of Dongwu in the Three Kingdoms period at the end of the Eastern Han Dynasty. Although he was young, he was ordered at a critical moment. When Liu Bei's army came to attack, Sun Quan pushed through the crowd and activated Lu Xun, a weak scholar, as the governor of the whole army. Lu Xun didn't live up to Sun Quan's high hopes. He successfully blocked the menacing army of Liu Bei in Yiling, and seized the opportunity to establish his position among the four governors of Dongwu with a fire. After the Yiling fire, Lu Xun led an army to chase the defeated Liu Bei and strayed into the Eight Arrays, but for Zhuge Liang's father-in-law Huang Chengyan's kindness, Lu Xun might have been trapped and died in the Eight Arrays.
Eight Arrays is an ancient art of war, which was earlier than the Three Kingdoms period. It was by studying the Eight Arrays that Zhuge Liang created a more subtle Eight Arrays diagram. It can be said that Zhuge Liang was the only person who knew the Eight Arrays during the Three Kingdoms period. Although Lu Xun had strong military capabilities, there was no record that he knew the ancient arrays. It can also be seen from his trapped eight-array diagram that Lu Xun is not good at this. Before Lu Xun entered the array, it was found that the array was full of mystery and combativeness. But because Lu Xun found that this formation was just piles of seemingly random stones, he was able to shrug off it and entered the large array lightly.
Lu Xun was able to extricate himself from the Eight Arrays because Huang Chengyan, who Zhuge Liang arranged to guard this array, was very kind (or it may be a hint from Zhuge Liang in advance), which kindly led Lu Xun out of the array. After the battle, Lu Xun also realized that he should not go deep alone, but stop when he is too good. With Lu Xun's ability, it is difficult to see through the eight arrays, let alone break the array.
The mystery of Eight Arrays is only found in the descriptions of ancient books, and it has long been lost. I'm afraid that no one can break this array except Zhuge Liang.