To allow Jingyin to enter Spirit Realm in a short few years, no matter how Zong Shou thought about it, he could only reference from both Buddhist and Demon Faction techniques to find an improved way.
After implanting his own Spiritual Demon Seed, he ordered her to view his Beginning and End Dharma to comprehend and cultivate.
This was the benefit of the Buddhist Faction Dharma Cultivation route.
With the help of the various Buddhas, with a formed Dharma to reference to, it was much quicker than the formation of True Image by the Taoist Faction.
As long as one was talented, even in a world where Spiritual Eergy was weak, one just needed 5-6 years to see success.
Jingyin used him as her Buddha, allowing his Beginning and End Dharma to directly shine onto her Soul Ocean Void Space.