The reason why Ye Mo was going out in search of herbs and materials was because even though Luo Yue had published a list to the world, it hadn't been very effective. Some materials which he needed had been found, but not a single true spirit herb.
Ye Mo knew that spirit herbs usually grew in dangerous places and were hard to get. Spirit herbs also had the instinct to protect themselves like humans. They wouldn't grow in normal places, so Ye Mo could only try his luck himself.
After Ye Mo left Luo Yue, he first went to Ning Hai. Tang Beiwei was willing to move to Luo Yue now and would be helping Ye Mo manage the spirit herb garden he planned on growing. But the Purple Heart Vine was at a critical stage of its growth, and it wasn't good to move it, so Tang Beiwei couldn't leave Ning Hai just yet.
