Really an idiot

Yue Ling arrived at her office without running into any employees. She reaches for the door handle to her office but pauses when she notices the door to her assistant's office is open.

She turns away and heads in the direction to the left.

"Oh, good morning, boss."

Liu Shan greets her with a smile like every other morning. He had heard her get off the elevator and thought she would go into her office like usual. However, he was surprised to see her stand in front of his office.

"Is something the matter?"

Yue Ling stares at her assistant with an expression void of any emotions. She scans the room for a brief second before turning away.

"My office. Now."

Her tone was calm, but something behind it made Liu Shan feel all the hair on his body stand on its ends. He didn't know why but she sounded angry.

Did he perhaps make a mistake? But he can't recall anything.