The Demon God Chart on the Wheel of Destiny increasingly resembled Zhou Wen, but Zhou Wen's body was becoming more and more like Tsukuyomi. This wasn't just a change in appearance, even his Essence Energy attribute was beginning to change towards Tsukuyomi's.
However, because Tsukuyomi's order in life was too high, Zhou Wen wasn't able to completely replicate it. He focused on replicating Tsukuyomi's Essence Energy attribute, so his body wasn't completely the same as Tsukuyomi's.
However, when the symbol on the Wheel of Destiny completely transformed into Zhou Wen's appearance, the Demon God Body instantly broke through some restrictions and transformed into a state identical to Tsukuyomi's. The two of them were like twins. Even Monkey Sun with his fiery eyes and golden pupils probably couldn't tell the difference.
Zhou Wen extended his palm and pressed it on Tsukuyomi's back, injecting his Essence Energy into her body.