Luo Chen didn't know what Red Dust Qi was.
But he knew that if Combined Cultivators consumed it in large quantities, there was a significant chance of breaking through to the Mahayana Period.
Luo Chen even suspected that the Spirit Shaping Holy Spring set up in the Land of Fallen Demons back then was likely a Spirit Spring diluted by the Refining Heaven Demon Monarch using Nether River Divine Milk.
Now Chu Yan was using this as the main ingredient for pill refinement, and employing such vast human and material resources, the pill refined must be extraordinary.
This could be seen from the fact that the elixir had yet to be fully formed.
It seemed that even with Chu Yan's abilities, she could not truly refine this item directly, which is why she sought external methods to nurture it, attempting to let it form a Finished Pill.
Chu Yan had been observing Luo Chen, and from his fleeting shock, she realized he might understand some relevant details.
But she didn't explain much.
