He Xiwen entered the experimental cabin to record data. Ji Danyang, Chu Huaiqiu and others paid close attention to her every move. They were well aware of the dangers of this kind of experiment. Once there was a problem with the air circulation injected into the cabin, He Xiwen would suffocate, and everyone present would be suffocated. Everyone was sweating for He Xiwen, only Bai Hui watched all this with cold eyes. The test cabin suddenly made an abnormal sound, and everyone present was startled. He Xiwen detected that the pressure in the cabin had not changed. Before the expert team could find out the cause of the abnormal sound, a second abnormal sound followed. Ji Danyang and Chu Huaiqiu realized that the situation was not good. He Xiwen was dizzy and breathing rapidly due to the imbalance of air pressure in the cabin. She tried hard to continue recording data, but she was unable to do so. There were more and more toxic gases in the cabin. He Xiwen suddenly had nose bleeding and fainted. On the operating platform, Chu Huaiqiu ordered the hatch to be opened. Ji Danyang was puzzled. He had repeatedly calculated countless times. People who entered the test chamber could last at least ninety minutes, but He Xiwen only stayed for thirty minutes. After the full rescue efforts of medical staff, He Xiwen finally turned the corner. Since she had inhaled too much toxic gas in her body, she might have sequelae. Ge Yun promised to go all out to save her.
Pang Hongmei came to the workshop to inspect the test cabin. Chen Dongsheng was discharged from the hospital early and came later. Niu Pei carefully inspected the test cabin first and found no abnormalities. He welded strictly according to the drawings provided by the expert team, and the test cabin was guarded day and night. Pang Hongmei was going to design the drawings. Asking the expert team members to recalculate, Li Peizhang found that the problem lay with Ji Danyang. He calculated the air intake volume from 70% to 90%. The gas imbalance in the test chamber caused He Xiwen's poisoning. Chu Huaiqiu and Pang Hongmei didn't believe that Ji Danyang would make such a low-level mistake. He had always been serious and responsible in his work. Li Peizhang asked Gong Jie to do the calculation again, and the calculation result was still 70%. Ji Danyang calculated the experimental data and found that the problem was with himself. He had overcalculated by 20%. Ji Danyang was filled with self-blame. He stayed outside He Xiwen's ward. He Xiwen was still in a coma. Bai Hui said to He was good at persuading.
Pang Hongmei and Chen Dongsheng called Ji Danyang for questioning. Ji Danyang admitted that he had made a mistake in his calculations. The problem was the number 1. Pang Hongmei did not believe that he would make such a mistake and took his calculation paper back. Chu Huaiqiu took the main responsibility for the accident, gave himself a major demerit, and suspended Ji Danyang's work. Ji Danyang had to pack his things and go back to the dormitory.
Pang Hongmei took the calculation paper and read it countless times. She didn't understand the formulas and couldn't see the problems in them. The hospital invited Dr. Ma, an expert from the provincial capital, to give He Xiwen symptomatic treatment. He Xiwen finally regained consciousness, but Ji Danyang still couldn't let go. Li Peizhang came to Ji Danyang to settle the score. Because his negligence caused He Xiwen's accident, Ji Danyang could not defend himself and had to leave silently. Chen Dongsheng found out that Bai Hui had sent something to Ji Danyang, and suspected that she was playing tricks on it. Due to the lack of conclusive evidence, Chen Dongsheng discovered that something was wrong with Bai Hui recently, and she and Zhang Ling were very close. Ji Danyang came to the workshop in despair, and entered the test cabin in person. Niu Peixian and the workers worked overtime to check and confirmed that there were no problems with the welding of the test cabin, which made Ji Danyang feel even more guilty.
Chen Dongsheng held a case analysis meeting and excluded the test chamber so that the police officers could focus on investigating the relevant personnel one by one. Pang Hongmei suggested that Wu Rui should be investigated carefully. Ji Danyang locked himself in a room and refused to eat or drink. Bai Hui came to see him and greeted him, but Ji Danyang forcibly drove Bai Hui away. When Pang Hongmei learned about this, she came to see Ji Danyang, gave Ji Danyang a severe lesson, and encouraged him to cheer up and find the cause of his mistake.
Li Peizhang, Gong Jie and others came to see He Xiwen. He Xiwen felt very unhappy when he learned that Ji Danyang had been suspended. Ji Danyang heard their conversation outside the door, and he had no face to face He Xiwen, so he had to leave silently. Pang Hongmei came to Ji Danyang to apologize. Ji Danyang admitted his mistake. He cheered up and recalculated the experimental data.
Ge Yun felt that Ji Danyang had a psychological problem. He was depressed because of An Wenshan's unexpected death. Bai Hui was thoughtful. She came to see Ji Danyang as soon as she got off work. Ji Danyang didn't want to say anything and just wanted to be alone. Bai Hui took him out to relax, and the two of them climbed over the wall to leave the factory in the dark. Bai Hui took Ji Danyang to Dongshan. They sat on the top of the mountain until dawn.