It wasn't Chen Ku managing the fire. If Chen Ku took over after a while, he probably wouldn't be able to maintain such a steady flame. Switching people back and forth would cause fluctuations in the fire's intensity, and there was a high probability that this batch of pills would be ruined.
Elder Shang, after all, is not someone immersed in the Dao of alchemy. It's understandable that he wants to nurture disciples, but excessive coddling can lead to failure. By taking over the fire control for his apprentice like this, it's impossible to train a true Alchemist, Nong Baosen mused, shaking his head.
He decided that after this was over, he would have to give Shang Yunfang some serious advice. This was no way to indulge a disciple.
Huo Xiaoxia also found it somewhat unbelievable.
However, what the two of them didn't know was that Shang Yunfang, standing before the furnace at this very moment, was actually very surprised.