C54 The love of the sixth princess

Grand Supreme Elderly Lord had agreed to take Niu Xiaobao as his disciple.

If Niu Xiaobao couldn't even do things like refining pills, how could he learn all of Grand Supreme Elderly Lord's medical skills?

After this batch of pills was refined, several days of the mortal world's time was used up.

Niu Xiaobao guarded the pill furnace the entire time, not daring to let his thoughts wander