Prehistoric: Jie Jiao's Headmaster, the Head of the Three Heavens Went There in Person

In the seventh year of King Zhou's reign, there was a sudden thunder in the Wa Palace. When Chen Ke, the headmaster of Jiejiao, opened his eyes, the clouds and mist beside Zizhi Cliff were dispersing. The system beeps to load - the sign-in system is activated! The reward for signing in on the first day is the "Deduction Chart of the God's Tribulation"!