Tang Yin did not need a Training Manual. He already possessed the Heaven Devouring Abyssal Sanskrit which was suited for the Heaven Devouring Abyss. However, he was still shocked at Tian Huang's versatility. There were Tier 4 Training Manuals included in the jade token!
After thoroughly reading the first jade token, Tang Yin moved on to the next jade token.
The second jade token contained even more content which Tang Yin yearned for. It explained and described the cultivation realms after the Mortal Step!
Along with explanations of the cultivation realms after the Spirit Ascension Realm, Tian Huang had embedded his experience and guidance for each realm.
Once a cultivator reached the peak of the Qi Transformation Realm, they would need to form a Soul Sea to enter the Spirit Ascension Realm.
The Soul Sea was a sphere in the mind of a cultivator. Their soul would reside inside of it. Not only that, but they would also develop a spiritual sense cultivators called 'divine sense'.