Only a portion of the Northern Spiritual Energy can become Ling Zhenfei's own, while the rest is concentrated within him.
This Northern Spiritual Energy is what has enabled Ling Zhenfei to endure for such a long time, but now most of that energy has dispersed, so he needs to immediately focus on cultivation.
Time is still very crucial for Ling Zhenfei, so since sitting down to cultivate, he hasn't left the room.
To heal his wounds quickly, Ling Zhenfei takes an elixir every six hours.
During cultivation, he absorbs all the elixir's effects into his body to speed up his recovery.
Ling Zhenfei cultivated non-stop for three days before finally stepping out of the room.
Although he cultivated day and night, it's impossible to completely heal the internal injuries in such a short time.
Especially the internal injuries Ling Zhenfei suffered, they're slow to heal, so he can't rush it.
