At that time, he wouldn't just get himself into trouble but would also implicate his family.
However, there's no wall that leaks no wind; as long as someone knows he's refining the antidote, the news will gradually spread out.
Someone like Long Tengyu, an outsider, is more likely to let the news slip out.
As a result, half a month later, the news reached the ears of the cultivators of the Shadow Organization from the Empire of Dongying.
The Empire of Dongying has spies everywhere in the Shenzhou Country, so it was easy for them to acquire information within Shenzhou. They even had informants planted within the Capital Noble Families, making it easier to obtain the latest news.
The Shadow Organization of the Empire of Dongying believed that Lin Yifan was a weed that must be eradicated, or it would disrupt their grand plan of conquering the Central Plains Cultivation World.