Soon, the fuel burned out.

Wu Tong's gaze moved, first looking at the display screen in the test room. All the data were as expected, especially the cooling system data, which met her prediction of a 50% increase, achieving a 53% increase in energy efficiency, which was not bad.

After cooling down a bit, Wu Tong and his men took a closer look and confirmed that this time, the engine nozzle and nearby components were indeed not damaged. The damage to the coating needed to be detected with more sophisticated microscopic instruments and could not be seen with the naked eye.

But comparing the current situation with the last time, the coating is successful, and the positive auxiliary effect is quite obvious.

"The second test run was a complete success. Thank you everyone!" Wu Tong immediately announced this exciting news. Looking at this sophisticated masterpiece in front of her, she felt very emotional.

From learning to putting pen to paper on the design, and then to turning the design drawings into reality, and after one and two test runs, it is truly perfect.

After three full months, we can finally say that we've lived up to expectations and successfully developed the scramjic dual-pulse compression engine! After the experimental team cheered, Wu Tong smiled and gave another order.

"A hundred steps have been taken. Thank you all for your hard work. Please restrain your excitement. Let's start by collecting experimental data. I'll report the progress to my superiors later and take credit for it!"

"No problem, Mr. Wu, it won't be hard for us, we will complete the task!" A group of people responded one after another. It was Mr. Wu who took the lead in overcoming difficulties one after another, and they were all a group of people who were fed by Mr. Wu and benefited from him. If they couldn't do such a small thing as collecting data well, they would be too ashamed to face people!

Wu Tong returned to the office and took out the overall design drawing of PL-15. The power unit was basically finalized, the body design was finalized, the ammunition part was being synthesized, and the warhead was being assembled and manufactured.

It wasn't too far from complete synthesis. Supervising the preparation of the warhead, the body, and the design and preparation of the guidance system would be her next focus.

Wu Tong dialed the phone, "Teacher Lu, Happy New Year. Sorry to bother you at this time!"

"Wu Tong, Happy New Year, I won't bother you!"

On the first day of the new year, he returned to the Weilong formation. This ultra-long-distance debut was a complete success, proving that the Weilong was superior in every way. He could be considered to have truly completed and delivered Project 20. He finally breathed a sigh of relief, took a short break, and spent time with his grandfather in Beijing.

The next project to be launched will be to strive for a truly international fifth-generation fighter. The person in charge will depend on the country to decide whether to continue using it.

"Want to ask about the guidance device? I've roughly finalized it. Give me another week and I'll have the detailed design ready for you!" Wu Tong wasn't the type to call for small talk. She was so busy back home that she didn't even have time to go home for the New Year. She'd contacted him for one reason: the progress on the guidance device.

Knowing the importance of this, Lu Xiao informed Wu Tong of the progress without any excuses, just as Wu Tong had assisted Weilong in his progress.

"Thank you, Mr. Lu, for your hard work!" Wu Tong thanked him and hung up the phone before making another call. "Engineer Xu, how's the progress on the missile body material?"

"Mr. Wu, the equipment is basically in place. We're currently in the process of upgrading our production line. Calibration and testing will be completed within three days. We estimate that if everything goes smoothly, we'll have the best possible missile body ready for you within five days, by the seventh day of the Lunar New Year at the latest!" Engineer Xu confirmed firmly. If he hadn't been upgrading the production line, he would have completed this step long ago.

"Okay, thank you for your hard work. I'm leaving everything to you!"

Wu Tong noted the time in his notepad. The two chief engineers were both trustworthy people. If they said it was this time, it would be this time, without any discrepancy. After the launch device was successfully launched, Wu Tong uploaded a report to the system, including information on the successful development and preparation of a new high-temperature resistant coating. This coating had a wide range of uses, especially for various missiles currently in service, and was essential for their switch to N24 fuel.

This high-temperature-resistant coating can also be used in other sectors of aerospace. Wu Tong has also backed up the information on the new cooling system and will hand it over when the time comes. He hopes it will provide some inspiration for their work, depending on who needs it.

As things were arranged one after another, night fell again.

It was a cold night and dark early. Thinking of his parents, Wu Tong did not continue to work overtime and hurried back home. He also had dinner with Wu Jingzhong and Jin Yu who had returned from outside. The cafeteria has a wide selection of dishes and the taste is also good. It serves scientific researchers and the most basic conditions are sufficient and complete.

After verifying the conditions of the cafeteria, Wu Jingzhong and Jin Yu felt much more at ease about their daughter's life there. They also met with Cai Yi and others today to discuss the situation, choosing only what to share. To reassure Wu Tong's parents, Cai Yi provided many answers, which gave Wu Jingzhong and Jin Yu a comprehensive understanding.

Tongtong has a dedicated guard, and his safety is guaranteed. Tongtong's daily life and logistics are taken care of by a dedicated person. Nutritious and comprehensive meals will be delivered to Wu Tong on time. Regular physical examinations are also conducted, and Tongtong's health is under the responsibility of a dedicated person...

All services revolve around Tongtong. She only needs to concentrate on her research and does not need to worry about other trivial matters. It can be said that the arrangements are more thoughtful than those of their parents. What else do they have to worry about!

So, after some discussion, Wu Jingzhong and Jin Yu, though reluctant, decided to return home early on the fourth day of the Lunar New Year. They couldn't help Tongtong much here, and it would only make her more worried. Since Tongtong was doing well here, they were relieved. Returning home early would allow Tongtong to fully devote herself to the research she loved.

Tongtong has already chosen the path to take and is studying things that are beneficial to the country and the people. They are proud and support it wholeheartedly.

"Isn't it the sixth day of the New Year?" When Wu Tong returned to her residence on the third day of the New Year and heard her parents' decision, she was a little caught off guard. She was still planning to catch up on her work and try to see her parents off on their way home on the sixth day.

"It's all good for you. Your father and I are confident in our country, so we'll delay. Go back early so you can spend time with your grandparents. I'm your mother, but I'm also their daughter. Your grandparents and your uncle are all worried about you. We should go back early so we can talk to them about your situation and put their minds at ease!"

Jin Yu's words made sense. Although Wu Tong was reluctant, he did not try to dissuade her.

My parents are here. She went out to visit on the second day of the Chinese New Year and stayed in the dormitory. It was such a small place, and she would be gone for the whole day. She would come back in a hurry at night and could not say a few words. My parents felt sorry for her and wanted her to rest early. She really didn't spend much time with them. They couldn't let her stay here bored because of her reluctance.

"I will finish the task as soon as possible and stay at home for a longer time!" Wu Tong sat between his parents, resting his head on his mother's shoulder, and made a deep promise.