Lin Wu could not even be considered to have properly cultivated the Taiji Dual Unity Scripture. There was the issue that the information about it was greatly limited and even the information hidden in the tomb was encrypted that the system couldn't access.
The only method Lin Wu had was to continue cultivating it. And as far as he knew, a cultivation technique on this level would take hundreds of years to show effect.
The Taiji Dual unity scripture had more than just a basic cultivation method in it. There were many skills, Dao insights, and a lot more composed in it all. It was just that Lin Wu had not gone into the comprehension part yet.
It wasn't entirely his fault either, as the Taiji Dual unity Scripture was not simple either. Cultivation techniques like the Immortal Sky Shaker art that were considered top level in the Ming Dao world alone took a few years to learn and decades to get competent in.
