Although Xi He and Changxi were unwilling to join the Demon Clan over this, Di Jun did not mind.
If he were in their place, he probably would not agree either. Attraction between their origins and a little fondness were not enough to make them put themselves in danger and ruin their paths of cultivation.
But cultivating Yin-Yang together would greatly benefit them all and help them break through their bottlenecks.
Once he had subdued or slain every Star God except them and Purple Light, revealed the Zhou Tian Star Formation, and shown that he could contend with the Earth Court—or even defeat and destroy it—the enormous risk would be gone. Then they might no longer refuse him, the mutual benefits of cultivating Yin-Yang together, or the vast Fortune held by the Demon Clan.
If he could then invite them into the Demon Clan, perhaps even become Dao companions with them and cultivate Yin-Yang together, all three of them could advance further. The Demon Clan would gain two more top-tier experts as well.
They both cultivated the Three Corpses Severing Method that Yuan Yan had improved. Given time for their Three Corpse Dao Bodies to grow until they matched their own cultivation, the Demon Clan's top-tier fighting strength would no longer fall short of the Earth Court's.
Besides, they were close to Purple Light. Even if they could not persuade Purple Light to join the Demon Clan, they should be able to persuade Purple Light to let him take some of Ziwei Star's origin to complete the Zhou Tian Star Formation, and not stop him from drawing on the power of Ziwei Star's origin.
For that reason, he did not intend to move against Xi He, Changxi, or Purple Light!
Of course, if they still refused to join the Demon