Xia Nichang has provided protection during the inner alchemy process for others more than once or twice. She's extremely experienced and noticed something off with Guan Hongxiu's state.
Of course, the "off" is relative; the process of inner alchemy is different for every cultivator. Some are ambitious and aggressive, while others are calm and steady. Whatever suits them is best.
If Feng Jun weren't there, Xia Nichang could only wait and hope that this was Guan Hongxiu's unique inner alchemy experience. But since he was there, she naturally hoped to get more advice.
Feng Jun occasionally deduced the situation previously but couldn't see much change. Eventually, he realized he was overly concerned and decided to completely let go of the deductions.
