Reasoning

Ling Ran carried a backpack and slowly followed behind Yu Yuan and Zuo Cidian.

Zuo Cidian's entire body was tense. He said, "I feel like everyone is watching me."

Yu Yuan tightened her fist and said with a quivering voice, "It's okay, everyone is just looking at Ling Ran."

"I know, but I am still nervous." Zuo Cidian shook his head and said, "To tell the truth, I don't know how Ling Ran persisted throughout these years. It is very difficult to be stared at every day."

"It will probably be very hard." Yu Yuan could not help but pity Ling Ran. She then turned around to Ling Ran and said, "Doctor Ling, you got a first-class ticket, you should be able to go to the security check from the fast-track lane."

Yu Yuan followed Zuo Cidian to queue up behind a long line who were waiting for their security check. In comparison, the fast-track lane to the left was basically empty.