Of course, the situation Book of Sage Immortal spoke of was based on the success of the cloning project.
Given the strength of the imposter they were currently facing, a successful clone of a true Ling Zhenren wasn't as easy as the other party might have imagined.
From Book of Sage Immortal's analysis, however, Odd Zhuo had gleaned some key information:
1: The enemy had come prepared this time. It was very clear what their goal was: they had abducted Student Fang Xing in order to obtain Immortal She Pi's cremation urn and resurrect the latter.
2: They had massacred scientific researchers on a large scale in order to bring them back to life in the world of the Palace of Mirrors. Under Immortal She Pi's leadership, these scientists would study human cloning in order to clone an army of Wang Lings.