The suitcase contained a piece of red crystal, which also came with related annotations. After reading them, Chiang Wei realized the importance and uniqueness of the object.
Chiang Wei didn't understand what Essence of Life was, but it had many functions that could drive many people insane. What Zheng Yichen wanted were the research results related to it, from all aspects. If there were good results, there might be a chance to obtain new Essence of Life.
As for the difficulty of acquiring Essence of Life... It was very high for outsiders, but not hard for Zheng Yichen to obtain. Ahn Ke's side also received a significant share because of their research needs. Zheng Yichen merely undertook an additional process, gaining a lot of information from the Evil Spirit, which related to various Evil rituals.
The Ahn family just wanted that thing.