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So precisely because of this kind of confidence and such economic strength, none of the early generals and civil servants who followed Xu Ding betrayed him. This is not only because of loyalty, but also because of the strength of Weiyuan Island.

Xu Ding nodded: "Basically, the money is mainly used to buy supplies and food from the states and counties. By the way, any new money with gear wear is not allowed to be circulated under our control, but you can go to the government to exchange for new coins."

The texture of brass is brighter and more lustrous than simple cylinders, it is not easy to oxidize and discolor, and it is also harder and harder to wear, so it is more suitable for circulation transactions.

The reason why brass is superior to ordinary copper is that it contains zinc.

The copper content of the brass that is allowed to be used is about 60.00% to 75%.

Therefore, the copper content of the new currency has actually dropped by 20.00%35 to about [-]%.

In this way, even if the bad money drives out the good money, the new money also has an advantage, not to mention the possibility that some speculators will melt the new money to make the old money and seek the price difference.

If they really do this, then 100% will suffer and cry.

Of course, it is inevitable that the consumption of zinc ore is not small.

However, there is no need to worry about this aspect. China is a big copper-deficient country, but it is not a zinc-deficient country.

According to the land area of ​​later generations, China's zinc mine reserves are huge, ranking second in the world.

At the same time, it occupies the fourth place among the major domestic minerals.

Most of the zinc mines in Shandong Province in later generations are distributed in Jiaozhou Peninsula.

Jiaozhou Peninsula is now Donglai County and Beihai Country.

Qucheng County under the rule of Donglai has a large zinc mine mined.

Zinc ore is a half-life ore, mainly together with lead, so it is also called lead-zinc ore.

The main use of zinc in later generations is mainly to make batteries.

Now Xu Ding has not yet developed into electricity, so the zinc produced is completely useless, it is better to add copper to smelt brass.

So Xu Ding naturally didn't have to worry about the lack of zinc, and could boldly mint new coins.

In the event that a large amount of zinc is really needed one day, the new coins can be withdrawn and the mainstream currency of silver coins can be used instead.

Of course, first of all, he has to find a large silver mine, so that he can carry out the second currency reform and upgrade.

Chapter 340 The birth of the hot air balloon

"My lord is wise, I will go down and make arrangements for this matter!"

There is no need for Xu Ding to explain the superiority of brass. Everyone in Weiyuan Island has seen it, and they have long been resistant to brass, so they are not as excited as before.

Mao Jie knew that their brass has incomparable advantages, whether it is luster, hardness or other, the key is that it contains less copper.

As long as they take back other old money and refine it into new copper, they will make money.

The most important thing is that once the new coins come out, they will definitely be widely loved by the people of the Han Dynasty, circulated to any corner of the Han Dynasty, and will be recognized by the people at that time. The new brass coins have established an unshakable position, and the old coins in the world will become more and more popular. The less, the minting rights were quietly taken over by myself.

Silently.

What is coinage right?

It is a symbol of a country and the cornerstone of the country's economic foundation. If it is not for troubled times, private casting is generally not allowed.

With the right to mint coins, wouldn't the wallets of other major princes be stuck?Isn't it in the hands of Weiyuan Island?

Of course, some people will ask, won't other princes continue to make old coins?

Yes, but when the new currency is popular and accepted by everyone, is there still a market for the old currency, and can the common people still accept it?

Comparing the two, one is more lustrous, newer, more lovable, harder and less prone to wear and tear, and it weighs more weight and preserves value. Whoever uses old coins wants to accept the kind of old coins that wear out and turn green at every turn? currency.

With nothing else to do, Mao Jie went down to make arrangements, while sending out the new 20 billion, while continuing to forge.

Then Xu Ding continued to work with Huang Yueying on the hot air balloon. Two days later, the hot air balloon was finally built regardless of the cost.

In order to witness this historical moment, Xu Ding asked Huang Chengyan and his assistants to be dragged over to observe together.

Of course, ordinary soldiers were driving, Xu Ding didn't dare to let Huang Yue and others go up.

Although it is correct in theory, it is inevitable that there are flaws, and he cannot afford to lose it in case of an accident.

"Get up! Get up!"

First, the airbag is filled with hot air and stands up, and then slowly throws down the weight of the hanging basket. As the weight decreases, the buoyancy generated by the airbag will straighten the rope of the hanging basket, and then slowly rise up bit by bit with the hanging basket up.

When the hanging basket left the ground, everyone who watched was exclaimed.

Huang Yueying also held Xu Ding's hand, nervous and excited.

The hot air balloon rose higher and higher, and continued to rise until the altitude of 200 meters, and there was still no problem.

Xu Ding knew that this was a success, and it was a success once.

The same is heart surging.

Of course, in this ascent test, a rope is connected to the hanging basket, and the other end of the rope is fixed to the ground, so it can only be raised to 200 meters, not higher.

Soon the soldiers above reduced their firepower output, and the hot air balloon landed slowly.

After falling, Xu Ding said: "Let's go to Yueying and experience your work for yourself!"

Xu picked up Huang Yueying and walked into the gondola, and then the two of them were inside. Following the same steps, the hot air balloon lifted off again.

After reaching 200 meters, Huang Yueying still couldn't believe it.

The hot air balloon really succeeded. Looking down from the top, the eyes are extremely open and the mood is excited.

"Brother Xu, what you said has come true, you are amazing!"

If it weren't for the theory provided by Xu Ding, she wouldn't be able to do this, Huang Yueying couldn't help hugging and snuggling into Xu Ding's arms.

Xu Ding stroked Huang Yueying's black hair smoothly, and murmured softly: "Silly girl, of course it will come true. I am standing on the shoulders of giants overlooking the world."

The two stayed on top for a while, and waited until Huang Chengyan and the others below had almost eaten their dog food, and then they came down to let them experience this new thing.

With the success of the hot air balloon, Huang Chengyan's assistants and apprentices were even more inspired.

It also greatly stimulated their enthusiasm for invention and creation. For a long time in the future, many inventions were gradually born from their hands on Weiyuan Island, which made an outstanding contribution to the future development of Weiyuan Island. contribution.

After staying with Huang Yueying for a few days, Xu Ding only started to deal with the follow-up matters.

First of all, he brought Xin Ping who was captured by Zhao Yun.