C265 Upgrading Again

Lu Shan looked through the ten formulas from beginning to end, making sure that he had memorized them all in his mind. Only then did he put the formulas away.

These ten medicinal formulas were not Skill Certificate. They could not be 'eaten' directly like they were in the game. Instead, they were printed on ordinary paper and printed on it.

This made Lu Shan feel that it was not very safe