Suan Bu Jin was just a disguise, Fang Yuan knew that in order to join Fang clan, his biggest obstacle was Fang Di Chang.
Because he was a wisdom path great grandmaster.
Usually, only experts among rank eights had great grandmaster attainment level, they were hard to deal with.
There would be too many traces left behind if Fang Yuan tried to use wisdom path methods to deal with Fang Di Chang's deductions. After all, Fang Yuan was just a wisdom path grandmaster, he was skilled at deductions and killer move modification in terms of wisdom path.
Using the light of wisdom, in terms of deducing killer moves, he was the number one person in the world.
But dealing with other Gu Immortals and resisting other wisdom path Gu Immortals' deductions was not Fang Yuan's expertise.
After Fang Yuan joins Fang clan, it might stir some strange feelings in Fang Di Chang.