Looking for Dai Zhiqiang

Li Caiyi felt light-headed by the time she arrived at her classroom. Last night, not even Dai Shenqiang replied to her message when she asked whether or not his brother had arrived home. It worsened her worry, and by the time the morning came, she had black circles under her eyes.

"Caiyi, good morning. Huh? What happened to your face?"

Li Caiyi turned her head weakly to find Feng Nian's fresh face looking at her in puzzlement. 

"Good morning, Nian. I might not have slept enough last night," Li Caiyi replied while rubbing her eyes.

"Did you spend all night writing again? That's not a good habit, you know." 

"Well, I did write until late last night, but that's not why I felt tired right now."