Naturally, the medicine that Xin Yi was using wasn't the Lesser Spring Water of Youth that Wei Xiao Bei gave her the last time. Rather, it was medicine made by mixing Inferior World Tree Sap with Chinese herbs.
Medicine like this was more than enough for a flesh wound.
After all, Wei Xiao Bei's [Medicine] skill was at the Perfection level. Just adding in the Chinese herbs had increased the effectiveness of the Ordinary Inferior World Tree Sap by over ten percent.
As long as it wasn't diluted with ten times the water like with the product being sold by Zhou Rong, it could still very quickly heal some external wounds.
Setting aside Zhi Xin Yi preparing herself for any possible danger, Wei Xiao Bei was looking at the two black brushes with satisfaction as they were slowly dragged into the rift in his palm.