Medicinal pills were divided into twelve levels. Medicinal pills above level 8 were considered high-grade medicinal pills. High-grade medicinal pills were very rare and could even attract heavenly lightning.
Levels 1 to 3 were pretty much elementary medicinal pills. Levels 4 to 7 were considered mid-grade medicinal pills. Honestly speaking, level 8 medicinal pills actually could only be considered mid-grade pills.
Chi Shuyan didn't know how medicinal pills were ranked in the world of Celestial Masters nowadays.
Thinking about how the level 3 Energy Recovery Pills were fought over at the auction today, it could only be said that level 3 Energy Recovery Pills were already very rare in this world.