Ever since the Tian Ji Sect was rebuilt, with the exception of the initiation of the new disciples, he spent the entire year tinkering on the sect protecting array.
The only person in Tian Ji Sect proficient in arrays was him. With the help of an expert, he could only install the sect protecting array while he studied on Chu Xingzi's notes. Because besides a sect protecting array, he also needed to install a grand spirit concealing array. Otherwise, the moment he releases the 13 spirit locking arrays, the rich, dense spiritual energy would be cause for covetion. Luckily, he had studied the array notes for more than a year, and he had already roughly installed the sect protecting formation.