So, Chen Lian couldn't immediately revive An Xiaomian, nor did he want to tell Shangguan Xiu that An Xiaomian had only feigned her death.
After all, doing so might mess up An Xiaomian's plan and give Shangguan Xiu an undeserved advantage. Chen Lian was currently trapped here, unable to take revenge on Shangguan Xiu, but given this opportunity, he wanted to make him suffer—because, after all, it was Shangguan Xiu who had kidnapped him and kept him locked up for so long.
When Chen Lian said that the next step was to give An Xiaomian an IV and conduct tests, in truth, he was only planning to administer some nutrient fluids to her. This was to provide her body with essential nutrients during the time she lay in feigned death, ensuring that her physical health wouldn't deteriorate due to lack of nourishment.