Chapter 141: People have their own ambitions

　　 The next day, Xu Qiu woke up earlier.
　　 After eating breakfast at 8 o'clock and doing morning exercises, it was boring to stay in the bedroom, so he got up and went to the laboratory.
　　 walked to the door of Caiyi 216, he was surprised to find that the door was open, indicating that there was someone inside.
Who is 　　?
　　 opened the door and took a look.
　　 is actually Tian Qing.
　　 is really unexpected. In the laboratory group of five, Tian Qing is the latest one in most cases.
　　 Because Xu Qiu is an undergraduate, his time is relatively free, and his time in the laboratory is early and late.
　　 Others, such as Feifei Wu and Chen Wanqing, usually arrive ten minutes earlier. Duan Yun's words are usually stuck.
　　 As for Yu Tianqing, being late is her norm.
　　 However, Teacher Wei always closed one eye to her.
　　 On the one hand, Tian Qing only intends to study for a master's degree. The other four are all doctoral students. The standards for master's and doctoral students are naturally different.
　　 Of course, this is not the main reason.
　　 The main reason is that she will complete the work that Teacher Wei gave her seriously, and her work efficiency is also high.
　　 Moreover, her recent work has also made a lot of progress and is being compiled into an article.
　　 In addition, her grade point is very high, so her English grades are naturally not bad, her writing speed is not slow, and the quality is not low.
　　Before, Xu Qiu also heard from Teacher Wei mentioned that if Tian Qing could stay and study for a Ph.D.
　　 It's a pity, everyone has their own ambitions, and you can't force it.
　　……
　　 Tian Haru sits at the desk with PAD on the desk.
　　 She is holding the digital tablet in one hand and the paintbrush in the other hand, seeming to be drawing.
　　 "Sister Tian Qing is early." Xu Qiu greeted her actively.
　　 "Morning, come and see how I draw." She waved to Xu Qiu.
　　 Xu Qiu walked over and took a look. The cartoon style with a big head and a small body. Isn't this Mr. Wei? The paintings are quite vivid.
　　 "This is Teacher Wei." Xu Qiu said.
　　 "Yes, my previous digital tablet was broken. Today, the new one was delivered by express delivery, and I tried it. It feels good," Tian Qing said.
　　 Xu Qiu was relieved, no wonder she came so early, she came to pick up the express.
　　 Room 201 on the first floor of the material is the residence of the doorman, and you can usually help collect express delivery.
　　 "Xu Qiu, I plan to draw a cartoon picture for every small partner in the laboratory," Tian Qing said:
　　 "Since you are here first, let's start with you."
　　 "Yes, how can I cooperate?" Xu Qiu naturally refused without reason.
　　 "Well, you just face me, don't move around," Tian Qing said:
　　 "Of course, if you want something like a back view, or have other special requirements, you can also ask for it."
　　 "It's better to be normal," Xu Qiu said.
　　The laboratory desk is a large square table, and everyone is sitting together.
　　 He found a seat opposite Wadaharu.
　　 "Xu Qiu, be natural."
"it is good."
　　 How can I feel like a guinea pig?
　　 Tian Qing painted very seriously, while observing Xu Qiu, while writing.
　　 Because it is a simple cartoon drawing, it only took a few minutes to complete.
　　 "How is it?" Tian Qing asked.
　　 "It's pretty vivid." Xu Qiu exclaimed after checking it.
　　 I have to say that Tian Qing’s talent for painting is still okay. The illustrations for her undergraduate graduation project were hand-painted by herself.
　　 In addition to painting, she has many other hobbies, such as playing ukulele.
　　 At around ten o'clock in the evening, after get off work, she occasionally got interested and would play it out.
　　The reason for choosing this time period is because the corridors are not soundproofed, and the bombs at this time will not disturb the people.
　　 At around 9:20, others arrived one after another.
　　 Chen Wanqing, Wu Feifei and Duan Yun each like to mention a cartoon picture.
　　 However, Han Jiaying did not show up all morning.
　　 The tool man who had just cultivated mature, just disappeared.
　　 Maybe something is going on.
　　 Xu Qiu shook his head and immersed himself in writing the article.
　　……
　　 Around two o'clock in the afternoon.
　　 Han Jiaying walked into the laboratory in casual clothes, carrying a schoolbag.
　　 "Why didn't you come this morning?" Xu Qiu asked casually.
　　 "Oh, I went to the boiling point club activity last night, and the rehearsal was very late, so I didn't get up this morning." Han Jiaying said:
　　 "By the way, two weeks later, there will be a school-level performance, which is an orientation party organized by the students. Would you like to come and watch, I can get some tickets."
　　 Xu Qiu was waiting for a reply, and Duan Yun next to him said excitedly:
　　 "The party? When will it start?"
　　 "It should start at six o'clock, and the end time is almost nine o'clock." Han Jiaying said.
　　 "That's good, we can go over after dinner, watch for a while, and then rush back to the laboratory before 7:30." Duan Yun said.
　　 Duan Yun meant that he agreed, and Han Jiaying turned to look at Xu Qiu and Chen Wanqing.
　　 "I'm fine." Chen Wanqing said.
　　 "I have no problem, I heard that you will perform on stage?" Xu Qiu said.
　　 "Yeah, but I haven't got the program list yet. Let me talk to the person in charge later and try my best to rank my program first."
　　 "What kind of show are you, single or multiplayer?" Xu Qiu asked.
　　 "The secret, I'll know it then." Han Jiaying smiled:
　　 "I went to the laboratory to notify Wu Feifei and Tian Qing."
　　 "Okay, you go." Xu Qiu said.
　　 Not long after, Han Jiaying returned with a smile and said:
　　 "They also agreed."
　　 Xu Qiu nodded and said:
　　 "How is the experiment done~EbookFREE.me~Your three systems, I will also make devices this week."
　　 After hearing "device", Han Jiaying's face immediately fell, and said aggrieved:
　　 "The efficiency of the devices of several systems I made for Sister Chen Wanqing is good, but the highest efficiency of the devices of my own three systems is only 4%."
　　 "4%, it's not too low. When I started PBT4T, I started with 4%, and then slowly achieved 10%." Xu Qiu first encouraged the school girls.
　　 In fact, the three systems for the school girl use BT units with two fluorine atoms, and the side chain is the same as his OD side chain, which is equivalent to having been initially optimized.
　　 The only difference between their molecular structure and Xu Qiu's system is the number of thiophene units. His is 4, and the school girl’s is 2, 3, and 5.
　　 Therefore, the names of these three materials are P2FBT2T-2OD, P2FBT3T-2OD, P2FBT5T-2OD, which can be referred to as P2T, P3T, P5T.
　　 The system that has been preliminarily optimized has a maximum efficiency of only 4%. If it were not for major mistakes in the school girl’s experimental operation, it would indicate that the upper limit of these three materials may not reach 10%.
　　 Even so, the pie that should be painted is still to be painted, in case there is a miracle, that's not sure.
　　 Xu Qiu continued to analyze:
　　"The performance of your current device is not high, there may be two reasons:
　　 The first is that there is a problem with your experimental operation, or the experimental conditions are not selected correctly. If you can find out and correct them in time, the efficiency may be greatly improved.
　　 The other is the material itself, the upper limit is relatively low, this problem is more difficult, at this stage we actually do not have a good solution. "