During the reign of Emperor Qianlong, the Tiandi Society would hold activities using Changhua as their base, making Changhua Taiwan's most important place in the rebellions against the Qing. Because their activities were essentially shielded by the mountain, it earned the same name as the society-Bagua (Pakua).
乾隆年間，每年天地會的活動，就以彰化為中心，是台灣抗清運動最重要的一環，而為會眾掩護屏障的這座山崗，則稱為八卦山。