Who is Juan?

Yun didn't say a word to Lijuan as he drove the car out of the restaurant. After his conversation with Lijuan he had told Yang Lei that something came up and so they had to leave immediately. 

"Are you upset with me?" Lijuan asked Yun with a worried frown when she noticed the change in his disposition. 

"Am I supposed to be?" Yun asked her quietly, trying not to sound hurt or angry. It seemed only Lijuan was capable of igniting such emotions in him. Her words had hurt him more than he cared to admit. 

How could she say what they had between them was just a fake relationship? Did she think he was doing all he was just because he needed a fake girlfriend? He could get any girl he wanted to play the role of a fake girlfriend if that was all he needed. 

He had thought they had gotten to a level of mutual understanding and friendship but it was obvious he had been wrong.