Nothing is More Important than Yiling Being Alive 

"Negative emotions. When someone is experiencing negative emotions, a yet-to-be-discovered hormone is released into his blood circulation. His heart can't withstand this hormone."

This explained why his heart started to go into cardiac arrest as soon as Jian Yiling experienced the accident.

As of now, the Zhai family still assumed that Zhai Yunsheng experienced a heart attack. And thus, they assumed that anything shocking which would cause him to experience adrenaline would result in a heart attack.

"Did you look into this?" Jian Yunmo asked.

"I found two hundred samples to experiment on. This hormone exists in the endocrine system."

When Jian Yiling was in the other world, besides looking for a way to come back to this world, she used the more advanced medical technology there to study Zhai Yunsheng's heart problem.

Over there, Jian Yiling did not dare to rest. After all, she did not know what was happening over in this world.