Of course, it healed so quickly because it was only a minor wound.
If a knife were plunged into Chu Changge's stomach, Gu Mian estimated Chu Changge wouldn't heal as quickly; he might even die. So, he didn't conduct an experiment involving such a thrust.
However, to compare the effectiveness of Gu Mian's skill, Fatty had also cut Chu Changge and applied a band-aid. As a result, Chu Changge still had an open wound on his hand that hadn't scabbed over.
Gu Mian sat in the tent on the roof of the Spirit Car, observing his skill panel.
Now, the 'Master Healer' skill had risen to level three. When medical items were used, the healing effect was tripled.
This could just about count as a health recovery skill, though its efficiency was a bit slow. However, if it reached level one hundred, perhaps it could heal someone on the brink of death until they burst from over-healing.