Jiang Chen brought back the Chaos Yuan Qi to the Nanbuzhan Continent for a good cause; if it were to evolve into something bad, that would be unfortunate.
Ninety percent of the Chaos Yuan Qi was devoured by the Nine Tripods, not to nourish them but to allow them to transform it into Innate Yuan Qi and then gradually release it to repair the shattered Spiritual Veins of the Nine States and reshape the mountains and rivers.
After ancient times, the Spiritual Veins of the Nanbuzhan Continent had all transformed into Acquired Spiritual Veins. Subsequently, the Human Race frequently ignited civil wars, causing the mountains and rivers to fragment and the Spiritual Veins to be severed, depleting the Spiritual Energy between Heaven and Earth day by day.
After the Nine Tripods devoured the Chaos Yuan Qi, it could transform it into a special Innate Yuan Qi, used to repair those shattered mountains, rivers, and Spiritual Veins, restoring the grandeur of the Nine States from ancient times.