(Thanks to Cema Xiaotianji's red reward, establishing the 25th master of the Door of Creation, mighty!)
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After Ning Cheng returned to Snow-covered City, his first task was the seclusion for refining the Seven Bridges Realm Book. If this blank book truly contained the Seven Bridges Divine Ability, it certainly wouldn't be weaker than the Five-colored Star-splitting Arrow.
To Ning Cheng's disappointment, after three months of secluded refining, the book still had only a name, and beyond that, he gained nothing.
Having no choice, Ning Cheng had to give up continuing to refine the book, as he couldn't possibly spend all his time on it. He needed to go to Jichi Lake to study the teleportation formation, as he was ultimately not at ease about Yan Ji being teleported away from there.
As for Xuanhuang Star River and Jiangzhou Star, Ning Cheng knew he didn't have to worry at all.