Harper spent three years in China as a military attaché in China, during which he led the US delegation to visit various units of the PLA Navy, Army and Air Force, as well as various scientific research institutes and production enterprises affiliated to the Chinese military.

Harper has always had a hint of awe for Chinese soldiers, and the war many years ago has proved the strength of the Chinese Air Force.

But for China's military industry, Harper is somewhat dismissive.

For example, for the "Model of Peace" program, Harper accompanied a delegation from the U.S. aviation community to visit the Shenyang Aircraft Industry Group in northern China and the Rongcheng Aircraft Industry Group in southwest China.

During the visit, they made an in-depth visit to China's aircraft factories and research institutes.

Although it was only a few days of sightseeing, the delegation of the American aviation community headed by Mr. Robert Hugh, senior vice president of Grumman, made this judgment: "China's aviation industry is still in a relatively low-level stage of reverse imitation, and there is a gap of 20 to 30 years with the United States in the fields of materials, radar, avionics, aerodynamic layout, engines, etc., and it does not have the ability to independently develop and design third-generation fighters at all." ”

This view coincides with the views of Harper's intelligence on China's military science and technology collected in the past few years.

In Harper's view, compared to the disciplined and self-sacrificing Chinese soldiers, China's military industry is completely unworthy of such an army.

You must know that even in the intercontinental missile test operation that shocked the world two years ago, most of China's carefully built ocean-going fleet was an empty shell.

Those new warships, which had just been launched not long ago, were not even equipped with missile weapons, and were hurriedly pushed to the test site by the Chinese.

From this, one can imagine how embarrassed China's military industry is.

This is especially true of the aviation industry, which is one of the leaders of the military industry.

During the visit, Hugh and others found that most of the machine tools used to manufacture precision parts were Soviet products in the fifties and sixties of the last century, not to mention the fields of pneumatics and avionics.

Of course, for Americans, this is something to be happy to see.

The more depressed China is, the more it needs the help of the Americans, so that they can open their mouths and slaughter the Chinese in the next negotiations.

After staying in Rongfei for three days, Harper and people in the American aviation industry have basically understood the current situation of China's aviation industry, and they are not so concerned about the next inspection and visit.

The only thing that Harper and Harper look forward to is the variety of cuisines that change every day, and the research of Chinese in terms of food is really eye-opening for everyone in the delegation.

Hugh and the others even joked privately that if China's aviation industry had one-tenth of the food skills, it would be enough to beat the whole world.

Harper agrees with this.

Before I knew it, the expedition had entered its final day.

That afternoon, just after lunch, Harper and his family took a small van from their hotel to the computer center of 611.

There, according to the Chinese, they arranged an elaborate computer-aided design demonstration for the American delegation.

Harper has always been dismissive of this statement.

Because just some time ago, when they were inspecting the 601 Institute, the engineers of the 601 Institute also asked Lockheed for their CAD software.

Unfortunately, the price between the two sides has not yet been negotiated.

It's just one thing for sure, the Chinese can't handle CAD technology at all.

Otherwise, with China's urine, it would have used this as a bargaining chip between China and the United States a long time ago.

Hugh and others have a similar view.

Because of this, when they hear Chinese say that they want to watch a demonstration of CAD software in the afternoon, most of them are dismissive.

Of course, semblance of politeness still has to be maintained.

After arriving at the computer center, the American delegation was placed in a small conference room.

In this room, the most eye-catching thing is a refrigerator and a small computer.

"Isn't this an antique computer from the 60s? ”

"Can this thing run CAD software?"

Members of the U.S. delegation privately discussed that companies such as Lockheed and Grumman mostly run on large and medium-sized computers, and their CAD software is very complicated to use.

But even so, in this era, CAD software is also a rare artifact in aviation, aerospace, automotive and other industries.

Just as Harper and the others were talking, a young man who looked unusually handsome stepped into the foreground.

The young man turned on the computer and said in fluent English: "Good afternoon, friends from the United States, and welcome to the 611 Research Institute of AVIC." During the visit in the past few days, I think you have a broader understanding of our institute, and I think everyone here has a deep understanding of the gap between the aviation industry in China and the United States in various fields. ”

"But today, I'm going to introduce you to a software that may not be what you think, because it's the world's first CAD software with complex surface modeling capabilities and assembly design. ”

The scene was quiet for a short while, and soon fell into a commotion.

The U.S. delegation, in particular, bowed their heads and whispered one by one.

"This young man's English is good, but his tone is a little bigger!"

"When will the Chinese be able to study CAD software on their own, why haven't I heard this news at all?"

The crowd in the audience was full of discussions.

In particular, most of the members of the US delegation had sarcastic smiles on their faces, believing that the Chinese were just bragging.

Yang Weining was unaware of the ridicule of the crowd and began to introduce the functions of the CAD software developed by the Americans as he had done in the previous functional tests.

"The first thing I would like to introduce to you is the 2D drawing function of this software, which is the basis of CAD software and has been around for more than ten years. ”

With Yang Weining's introduction, at first, Hugh was still a little disdainful, after all, 2D drawing is just a leftover technology played more than ten years ago, and it is not a big deal that the Chinese can develop it.

But then, aerospace sheet metal, assembly design, electrification path module, 2D 3D space drawing, ......

As Yang Weining introduced the functions one by one, unconsciously, the expressions on Hugh's faces gradually became solemn.

The software developed by the Chinese is really good, many functions are very innovative, although the overall is not comparable to the CAD software developed by the Americans, but in many aspects it is good, and many functions are very worthy of reference.