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But Zhang Jiao, observing the celestial signs at night and divining with the "Essential Arts for Peace," knew that the time had come, a perfect opportunity for an uprising.
Zhang Jiao declared himself the General of Heaven, called upon all under Heaven, saying, "The azure sky is dead, the yellow sky shall rise; in the year of Jiazi, great fortune for the world!"
At that time, the Taiping Sect had grown powerful, with five hundred disciples under Zhang Jiao practicing the Taoist arts and spreading doctrines, enjoying considerable fame. Though the sect counted a million followers, only three hundred and sixty thousand truly dared to take action. Appointing thirty-six leaders, they formed large units of over ten thousand and smaller units of a few thousand, each with their disciples named generals.