Chapter 464: Disappointment

The difficulty of refining a fourth-grade Precious Pill is more than ten times harder than a third-grade Spirit Pill!

Throughout the entire process, Li Zhirui couldn't afford to relax even slightly; he had to maintain complete focus at all times.

Otherwise, the slightest bit of negligence would inevitably lead to failure.

Furthermore, Li Zhirui's previous calculations were not accurate, and after using up fifty batches of materials, he still failed to successfully refine the Green Heaven Pill.

"Where did it go wrong?" Li Zhirui frowned deeply, utterly puzzled.

Despite years of mental training, allowing Li Zhirui to accept continuous failures with calmness, he still couldn't help feeling a bit impatient.

He had not made a single mistake at any step, yet he still couldn't obtain a successful Green Heaven Pill!

And these dozens of failures also made Li Zhirui hesitant to attempt refining again, for fear of wasting more materials.