Afterwards, finding and communicating with Lu Han about the issue made things much simpler.
The extra heart didn't affect Tongtong's health, so Lu Han wasn't worried. As for why Tongtong, like him, wouldn't be harmed by the Poisonous Insects raised by Lin Menmen, it was unrelated to Lu Han's initial thought about his Universal Blood.
Tongtong didn't have the same Universal Blood as Lu Han, but those Poisonous Insects feared Tongtong because the Parasitic Gu residing in Tongtong's ear was a formidable entity.
This type of Parasitic Gu that could reside within a human body was inherently stronger than other Poisonous Insects.
Coexisting with a human wasn't something all Poisonous Insects could achieve.
These matters took time for Lu Han to accept and digest by himself, so he didn't tell Tang Su about them.