There was another sound of footsteps outside the door, and it was supposed that another customer had come in.

Chen Qingwu heard Duan Jincheng say "Welcome", and then, Xu Xiaoxiao didn't move, and he didn't know if it was a temporary truce or if he had already left.

She waited for a long time, until the new customers checked out and left, and waited until the next wave of customers came in and out, and the pistol that scanned the code rang out again and again, before she dared to quietly open a crack in the door to take a look.

Xu Xiaoxiao is long gone.

Duan Jin Cheng was sitting in front of the cash register reading a book, and the light of the incandescent lamp fell on his body, illuminating him calmly and relaxed.

Chen Qingwu really admires his psychological quality, his girlfriend is angry and left, he is still in the mood to read? But think about it, if you don't have any psychological quality, how can you be the first in the exam while falling in love.

"She's gone?" Chen Qingwu asked softly.

"Who?" His eyes were fixed on the book, and he didn't even lift his head.

Chen Qingwu thought to herself that this person could really pretend, and asked her who she was? Who did he just stage a Qiong Yao drama with here, didn't he have any points in his heart?

"Are you arguing?"

Duan Jincheng didn't speak.

"The girl still has to be coaxed, or I'll help you work for a while, you can hurry up and coax." Chen Qingwu proposed that although Duan Jincheng and Xu Xiaoxiao together was the last thing she wanted to see, she really didn't want Duan Jincheng's already busy life to be troubled by more feelings.

"You're idle, aren't you?" Duan Jincheng slapped the book on the cash register and looked up at Chen Qingwu.

The young man's eyes were dark, and he did not see the brilliance of the past.

Chen Qingwu was slightly shocked by him, and suddenly felt aggrieved.

"What are you doing to me? Why are you quarrelling, and I'm still cannon fodder? ”

Duan Jin Cheng saw that the corners of her mouth drooped, as if she had been greatly wronged, and sighed deeply: "First, I am not fierce. Second, I didn't have a quarrel with her. Third, you will never be cannon fodder for me and anyone. Okay, here comes the question. ”

"Huh?"

He turned around so quickly in the end that she couldn't react.

"Didn't you just open the door and come out?"

Chen Qingwu then remembered that the problem he was stuck in just now had not been solved.

She went to get the question book, but she was still not very reassured: "Are you really okay with her?" ”

"You don't have to worry about that."

Duan Jincheng took her question book, read all the questions she marked, and began to focus on giving her ideas for understanding the questions.

The more calm he became, the more Chen Qingwu scratched his heart to know what the relationship between him and Xu Xiaoxiao was.

"First, find the average of five pairs of data, get the center point of the sample, substitute the data into the formula, use the least squares method to find the coefficient of the linear regression equation, and then find the value of a, so as to obtain the linear regression equation...... Chen Qingwu, are you listening? ”

“……”

"Chen Qingwu."

Chen Qingwu suddenly returned to his senses: "I'm listening, I'm listening." ”

"Really listening?"

"Really."

"I walked out of the clouds, and my mouth was quite hard." Duan Jincheng saw through her lying at a glance: "Then you repeat the train of thought I just said." ”

Where can she repeat the "......"?

"What are you thinking?"

"Nothing."

Duan Jincheng took out a piece of scratch paper and wrote on the paper with a pen, "Scumbags are not worthy of thinking about it."

Chen Qingwu remembered a certain silly memory, and his face began to burn again.

"Remember what you said?" Duan Jin Cheng drew a double solid line under this sentence, "I think what you said makes sense, but it's not comprehensive enough, in fact, at our age, whether we are a scumbag or a scholar, we are not qualified to think about it." ”