What are you running around for?

Wen Cheng had almost racked her brain on how to solve this problem.

Lan Xiao got into bed and waited for about ten minutes. Seeing that Wen Cheng still had no intention of sleeping, she couldn't help but feel a little worried. What time was it already? if she didn't sleep now, she would definitely not be able to get out of bed tomorrow.

Lan Xiao lifted the blanket, got off the bed, and walked behind Wen Cheng.

Her steps were light and Wen Cheng was lost in her thoughts so she didn't notice Lan Xiao approaching.

Lan Xiao sneaked a few glances and saw the question that had been bothering Wen Cheng for a long time.

this question should be solved like this. Lan Xiao took the pen from Wen Cheng's hand, found a piece of waste paper, and quickly wrote down the solution process.

Wen Cheng was so stunned that she forgot to stop Lan Xiao.

When Lan Xiao showed her the complete solution to the problem, Wen Cheng was still dumbfounded.