Ye Tianchen had not expected that the only way Zhang Yide mentioned to save Dongfang Meng was to take her back to the Ancient Tomb Sect, find the final layer of the Jade Maiden Heart Scripture's cultivation skill, and then undergo dual cultivation with her, which might heal Dongfang Meng's injuries. Otherwise, Dongfang Meng was beyond help.
Regarding the method Zhang Yide mentioned, Ye Tianchen had already guessed some of it. By now, Zhang Yide had used all the methods he could think of, but none could cure Dongfang Meng. Her fatal injury stemmed from using her Origin essence to unleash the "Jade Maiden Flying Immortal," an absolute skill, leaving only a trace left, which Zhang Yide preserved with his powerful superpower skill.