Xiang Yang was missing. She should've returned to the army to meet with Shi Nian after she left the hospital. However, Xiang Yang didn't return.
Shi Nian thought Xiang Yang wanted to spend more time with Shi Ke. He was too focused on other things, so he didn't pay this matter attention, whereas Yun Nan thought Xiang Yang hadn't contacted her after she left because she was too busy dealing with things on the army side with Shi Nian. Shi Ke had gone through a second operation and was in a semi-conscious state. For everyone's safety, he no longer contacted Xiang Yang directly.
By the time Yun Nan and Shi Nian realized the issue, Xiang Yang had already been missing for more than 48 hours. Yun Nan blacked out for a second when she found out and quickly reached out to support herself with the desk.