C70 Unexpected

How could Loong Yi, who knew nothing about pill concocting, know that he was at a critical juncture?

It was because Loong Yi noticed that an old man with a head full of white hair was quietly sitting beside the huge furnace that was as tall as two people! With the help of the "Spiritual Sense", Loong Yi was able to easily detect that under the seemingly calm surface, the elder's heartbeat was