Only when it was around midnight's time did Shuhang finished his training. With the aid of the Library's ability to find 'flaws', Shuhang was able to quickly perfectly integrate the Cause & Effect principle within the 1st hour into the training. The rest of the time, Shuhang meditated on the effect that the 3rd True Magic, Heaven's Feel, had on his own soul as well as his inner world itself.
Also, Shuhang fixed any flaws in the magic while he was at it. During this process, Shuhang had put extra effort and cut no corner at all since it involves his 'soul' and all. Not just nascent soul either, but his actual 'True Soul'.
"Huuu. Wow... the 3rd True Magic is a pretty crazy piece of work. After the 'flaws' were fixed, it got even better. Now I'm pretty much immune to any soul attacks. The only people that can successfully pierce my soul defense would be the 'Heavenly Dao' and their 'Nine Serenities/Nether World' counterparts. Until I break through to the next realm that is..."
After stretching himself a bit from 'meditation soreness', Shuhang teleported himself to the roof.
"Yo! Drinking tea under the moonlight eh? Not bad.. allow me to join you!