Two days after the entry procedures, I received a notice to go to the group of President Ying with Mr. Chen and General Manager Ouyang.

The topic of the meeting was very simple: the Russian side had basically agreed to cooperate with our group, and they would send a delegation to visit our group and, if there was no problem, to have business talks with us.

I found that as the British Federation said before, there are eight or nine technical experts in this project, all of whom are from the subordinate institutions of the British Group. They are solely responsible for the quality and quality requirements of the products. Our group is only responsible for bargaining with the Russian side.

I looked at the thick introduction of information about the "Groundhog" radar in front of me, and it was like reading a book from heaven. Not only did I not know what the data meant, but I had also heard the terminology for the first time.

It is no wonder that Mr. Ying thinks that the personnel of Mr. Chen Group can't talk about this project at all, and the people of our group can only distinguish the unit price, quantity and total price of the radar. The workflow of detecting, tracking, and analyzing the source is a big headache, not to mention the practical significance of those parameters.

The Chinese delegation is composed of all of us who are here today. Ying is always the head of the delegation, and Chen is always the head of the delegation. Two doctoral students who graduated from the Russian military department were interpreters for the talks.

Everything was ready, and the Russian delegation arrived as scheduled. There were seven of them, and except for Igory, the assistant to the head of the regiment, and the legal adviser, who were relatively young, the rest of them all looked to be over sixty years old. It feels like it's also an expert group.

The Russian delegation was very dedicated, they spent half a day inspecting our group, and in the afternoon they had talks.

The negotiations did not go well, and even smelled of gunpowder.

The Russian side's asking price made the British president very annoyed, but the Russian side's attitude was very tough and did not mean to compromise at all.

The Chinese side wanted to impress them in terms of the quantity we buy, so that they could give preferential treatment to large customers like us, but the Russian side pointed out that their after-sales service costs made it impossible for them to reduce the price anymore.

I have never experienced such a negotiation, and it feels like the two sides are not talking about terms but fighting for strength and patience.

The Russian side stressed that the performance of the products we proposed has gone beyond the scope of civilian products, and as a non-civilian product, they could not imagine that there would be such a low price.

Chinese experts point out that their configuration is far from military grade. We're not going to buy so many outdated radars!

The tip of the needle is against Maimang, the two sides do not give in, and everyone is still arguing during the banquet.

I smiled and asked General Manager Ouyang beside me, do we have to buy their radar? Can you change the seller? Ouyang shrugged at me with a noncommittal expression. Ouyang's actions from the Russians made me almost laugh out loud.

Looking at the emotional people, I can't help but think of the history of the prevention and control radar that I know in the past few days:

Shortly after the birth of radio, Russia's "father of radio" Popov and his assistant Rybkin conducted radio communication tests on the Russian Navy cruiser "Africa" and the training ship "Europa" respectively.

During the tests they found that when the cruiser "Lieutenant Ilyin" passed between the "African" and "Europa", the radio signal was interrupted and could not be received. And this causal phenomenon happens repeatedly, which indicates that electromagnetic waves are blocked and reflected by metal objects.

The American physicist and inventor Tesla also did the same experiment in 1900, and through the experiment, he came to the conclusion that "the use of radio waves with very short wavelengths can detect the traces of objects", which is actually the principle of modern radar.

Since then, many scientists have studied how to use electromagnetic waves to detect objects.

It is difficult to say who exactly was the inventor of the first radar.

In January 1936, the United States developed a pulse radar that could detect aircraft at a distance of 40 kilometers; In September 1935, Germany created a marine radar that could detect ships 19 kilometers away from the coast and 8 kilometers away; In 1936, France had already installed early radar on the "Normandy" mail ship to prevent collisions with icebergs.

But it is now widely believed that the first military radar to be put into practical use was developed by the British.

In 1938, Britain began to build the world's first air defense radar network with the radar designed by Watson-Watt.

By the outbreak of World War II in September 1939, Britain had established a "home chain" radar network of 20 ground-based radar stations on the east coast.

In the 60s of the 20 th century, various countries successively developed new radars such as pulse compression, frequency agility, and electrical scanning, which further improved the detection performance and anti-jamming capability of ground air defense radars.

Since the 80s of the 20 th century, developed countries have carried out technological transformation of the ground-based air defense radars that have been installed in accordance with the experience of modern local wars, and have made a qualitative leap in detection performance, four-resistance capability, and reliability. In addition, more than 30 land-based air defense radars of different systems have been launched one after another, strengthening the construction of the country's territorial air defense network and enhancing its early warning and surveillance capabilities.

Since the beginning of the 21st century, ground-based air defense radar technology has continued to mature. In the ground-based air defense radar systems of various countries, various technical systems such as active phased array, three-coordinate, and over-the-horizon have formed a situation in which a hundred flowers are blooming.

Moreover, in the face of more and more air threats, countries have spared no expense in developing and equipping various long-range warning radars, guidance radars, target designation radars, short-range low-altitude surveillance, and blind radars, so as to create a powerful and seamless ground-based air defense radar network.