Like the previous material technology, at this level, Wang Bin can''t buy technology beyond the scope of level zero civilization in the system.

    If you want to buy the technology of higher civilization, you must wait until the level of human civilization reaches level one.

    After reading these, Wang Bin felt that with their current ability of Tiangong technology, the technology to be considered should be closely related to their current products.

    Subsequently, Wang Bin checked the technologies related to glass, special steel and superconducting material technology in the system.

    However, what makes Wang Bin somewhat depressed is that there are many technologies related to these materials in the mall.

    But the price of these technologies is not cheap. Even some advanced technologies already owned in the real world are priced at more than 100000 energy coins.

    Take the lithography machine that uses special steel, optical glass and superconducting material technology. The price of a lithography machine with an accuracy of about 20 nm is as high as 500000 energy coins.

    If it is a lithography machine of about ten nanometers, the price is more than one million energy coins. As for a lithography machine of five nanometers, the purchase price is as high as tens of millions of energy coins.

    You know, this is tens of millions of energy coins, not tens of millions of real money. If it is tens of millions of real money, with Wang Bin''s current wealth, you can take it out at will.

    But energy coins are different. If ten million energy coins are converted into money, they must be multiplied by ten million times a million times, and this is only the basis.

    In fact, even if Wang Bin has so much money now, he can''t buy so many energy coins, even if he uses money to buy electricity for conversion.

    Because even if all the electricity consumed in a day in China is converted into energy coins, it may not be possible to buy five nanometer lithography technology.

    Of course, in addition to the five nanometer lithography technology, there are also lithography technologies with higher precision in the system, such as 2.5 nm lithography technology, 1 nm lithography technology, 0.5 nm lithography technology, and the lithography technology with the highest precision that can be purchased at this civilization level, 0.1 nm lithography technology.

    In addition, there are technologies related to these material technologies produced by Wang Bin and superconducting battery technology. Like previous lithography technology, there are many technologies in the system in terms of battery manufacturing technology, from the earliest carbon battery technology to water battery technology, to lead acid battery technology, various lithium battery technologies, and then graphene and superconducting battery technology.

    Therefore, different from the previous lithography technology, because the starting point of superconducting battery technology is very high, the price of even the lowest superconducting battery technology in the system is as high as millions of energy coins.

    Of course, in the system, there are many technologies that need to use their existing products, but now he can only look at them.

    The remaining energy coins in his hand are less than 5000. If he wants to buy technologies in the system, he can only buy technologies that are already outdated. It''s better to save the money first and buy those advanced technologies directly later.

    Just as Wang Bin was looking at the technology of the system in his mind, Donald walked in the door of their Tiangong technology store. When he saw Wang Bin, he said happily to Wang Bin: "Mr. Wang! I''m patronizing your business again!"

    Hearing Donald''s voice, Wang Bin first withdrew from the system interface in his mind, and then happily said to Donald, "Mr. Donald, you''re here. I don''t know what you need this time?"

    For customers, especially old customers like Donald, Wang Bin is naturally very happy. You know, since Donald bought special glass for the first time from Tiangong technology, up to now, he has ordered products with a capacity of about 5000 yuan from Tiangong technology.

    "Mr. Wang, the things I want to order this time are naturally the same as before, that is, glass and bearings.

    But because my country has launched a large-scale attack on our enemy and won a victory recently, our Yuanshou is very happy, so I am ready to place a larger order with you.

    After all, in this large-scale attack, the equipment of your products produced by Tiangong technology has played a great power.

    In particular, the Phoenix bomber mentioned in the data I gave you earlier bombed the enemy''s homeland more than a dozen times in a row in this month, which greatly deterred our enemies and made them afraid to devote their troops to the war.

    You should know that the bomb load of this Phoenix bomber is as high as 150 tons! One dispatch even has the ability to change the outcome of a small and medium-sized battle. Even if it is a large-scale battle, as long as it takes two or three times, it will definitely be a nightmare for our enemy. "Donald said happily.

    "Congratulations, Mr. Donald. At the same time, I hope your country can make persistent efforts to defeat all your enemies in the next war." Wang Bin continued to smile.

    Wang Bin doesn''t care much about the outcome of the war between Donald''s world, his country and other countries.

    Naturally, he is more concerned about how many goods Donald can buy from their Tiangong technology store this time, as well as the performance of special glass and bearings sold to him in their World War, and when he can give these data to Wang Bin!

    "But Mr. Wang, I also encountered difficulties. Because the war in our world has lasted for a long time, I don''t have many energy coins in my hand.

    Even in my world, I have established dozens of energy conversion bases. Using energy converters to convert all kinds of energy in reality is far from enough for me to consume!

    So this time, I want to buy products from you in other ways, that is, I said to you last time, use some advanced technologies in our world to offset the energy coins for purchasing products! "Donald said.

    "Yes! I don''t know what kind of technology you want to use to deduct energy coins, Mr. Donald. If these technologies have no effect on my world, or even far behind the same type of technology in my world, I won''t want them," said Wang Bin.

    For what Wang Bin said, in fact, Wang Bin didn''t have to say, he also understood.

    After all, even if he himself, if someone uses backward technology to exchange advanced products with him, he will not agree.

    Fortunately, the overall scientific and technological level of his world is far from that of Wang Bin''s world.

    However, as a businessman, he still has many advanced technologies, such as the design drawings and manufacturing technology of the Phoenix.

    At the same time, there are some things that have been designed in their world but cannot be produced because of the industrial level. Wang Bin does not necessarily have them in the world, so he is confident that with these things, he can definitely get a lot of goods from Wang Bin.