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On the other side of the Water Mirror, An Jing nodded slightly and immediately realized there was a business even more profitable and safer than trading Spirit Stones between the two realms.
In Linjiang City, he still had a number of yin-yang dual-attribute Spiritual Objects like 'Moon Rainbow Stone' and 'Sunshine Stone'. However, these kinds of Spiritual Objects were difficult to utilize for their Spirit Qi due to their complex mix, so they were generally used as materials for Great Formations, relying on quantity over quality.
But if Tianyuan Realm possessed the technology to refine Yin-Yang Spiritual Qi from these ores... it would truly be turning waste into treasure!
However, this idea had to be set aside for now, since it still involved using the channels of Third Middle School—the technology would only be maximally beneficial if it was in his own hands to exploit the difference in resources between Embracing the Void and Tianyuan Realm.