Soon it was Christmas, and Angel had already returned to the village. The two of them were tired of being together all day, which caused Mrs. Hans to be seriously dissatisfied. She made several trips to the farm to ask Hu Xiaoyan to get married as soon as possible, otherwise she would have to prepare other candidates for Angel.

Uncle Hans is also very supportive of this. It is said that a certain big man went to Hans's tavern on purpose. Uncle Hans did not interfere with Hu Xiaoyan and Angel's thoughts in the face of the pressure of money, which made Hu Xiaoyan a little moved.

Hu Xiaoyan didn't ask Angel who that kid was, but he was also angry in his heart.

Although Christmas is coming, the farm is still the same, Huo Yuanjia and Li Chen take Zhang Yunfeng and Jin Yunting and others to the jungle every day to adventure. The only thing that is incongruous is that He Siyi's girl stays by Hu Xiaoyan's side all day to make light bulbs. Angel is very fond of this little Chinese girl. She wanted to know everything Hu Xiaoyan was doing in China. And He Siyi is also full of curiosity about Angel, an extremely ugly foreign girl. The two of them have become very good friends!

On Christmas Eve, Wang Wenyuan found Hu Xiaoyan again.

"I figured out how to increase motivation." He looked excited.

"Diesel!"

"Diesel?" Hu Xiaoyan frowned.

"Yes. Diesel engine! I read in a magazine that diesel engines are now produced in the UK, and although they don't sell well, they are much lighter than steam engines! We need a diesel engine to put on the plane and try it. Wang Wenyuan had an abnormal flush on his face.

"But, you know. The performance of diesel engines is not stable. Hu Xiaoyan also saw the report of diesel engines. The scientific and technological prowess of the British Empire is the most powerful in the world. The diesel engine was actually invented a few years ago. At first, it was kept secret. There are no patents filed in the UK at all. But the result is not good, the performance of the diesel engine is not very stable for some reason! And the diesel engine uses diesel. Diesel is a product produced from petroleum. But there wasn't much oil in the British Empire at all! Its oil is completely supported by the Rockefeller Oil Company of the United States. In this era, the most important profit point of oil is kerosene! Kerosene lamps are the world's largest use of oil! This is followed by lubricants and gasoline.

Royal Shell, Britain's largest oil company, is actually just a transportation company, and they cooperate with Rockefeller Oil to ship Rockefeller's petroleum products to Britain for sale. There was also the Boma Oil Company, which was only looking for oil in the British colonies and transporting it back to the British mainland. In short, the British Empire had no love for oil at all.

But you can't blame Britain for this backward thinking! Before diesel engines were fully applied, oil really didn't have much use. Oil has no valuable use other than being made as kerosene and lubricating oil. As for gasoline! Haha, the current car is still something that only the aristocracy can afford, and the Ford Motor, which has fully promoted the car to the civilian world, does not know whether it has been established now.

Although the diesel engine was first invented in the UK, it was eventually abandoned by the British Navy. The inventor also became Rudolf Diesel of Germany.

"Why not a gasoline internal combustion engine?" Hu Xiaoyan was a little strange. Gasoline internal combustion engines have become popular, and even cars with gasoline internal combustion engines have appeared.

"Can you buy a patent for a gasoline internal combustion engine?" Wang Wenyuan glanced at Hu Xiaoyan with disdain.

Hu Xiaoyan was speechless. Compared with the diesel engine, the gasoline internal combustion engine has attracted people's attention because of the invention of the automobile, so his patent is not only expensive, but also more difficult to obtain. On the contrary, because the diesel engine was not interested, the royalties were very cheap, and it was only a few years later that American businessmen bought the patent for the diesel engine and used it to produce cars and trucks. This use was officially recognized by the world, and the effect of diesel engines gradually became stable after being vigorously studied by various countries. At the same time, the weight is also much lighter. Diesel engines in this era were much heavier than gasoline internal combustion engines.

"Let's use a gasoline engine. Weight is always a big obstacle for the plane to take off," Hu Xiaoyan finally decided.

"Buy a diesel engine too." Wang Wenyuan emphasized to himself. Hu Xiaoyan acquiesced.

Because patent issues are always a thorn. He didn't want to have to pay a lot of royalties to others when he produced every plane in the future!

Christmas Eve, which is Christmas Eve. Hu Xiaoyan gave his subordinates the next day's leave. The stinky boys all went to Uncle Hans's tavern that night to eat and drink. Hu Xiaoyan had to send Huo Yuanjia to take care of it. Although Zhang Yunfeng is very steady, Hu Xiaoyan still believes that Huo Yuanjia is a little more.

As for Chen Xin and He Siyi, they stayed in the manor as usual, especially He Siyi actually came to make a light bulb again, which made Hu Xiaoyan's dirty thoughts in his heart come to naught, so that his eyes when he looked at He Siyi were a little wrong. But eyes can't defeat He Siyi after all. This girl cheekily pulled Angel away.

Hu Xiaoyan could only sigh to the moon. He reluctantly went to drink old man Chen Xin as a companion. By the way, reply to some letters.

Letters are almost always from the university. Henry and others are urging Hu Xiaoyan to pay, and professors from Cambridge, Oxford and other universities have also come to make a fortune.

Christmas Eve is actually a day, not just a night. Hu Xiaoyan let go of his subordinates' vacation, but he couldn't get any news. These boys have been training hard lately.

Before noon, a rogue boy Tom came to ask for a reward. The reason is that he has found Wang Wenyuan's wife. After knowing that Wang Wenyuan had his own set of theories on the plane, Hu Xiaoyan called two boys to go to London to find his wife. Didn't find it until today.

Hu Xiaoyan beckoned Chen Xin and Tom to drive the carriage to London together.

Modern London is a beautiful and historic metropolis, with clean streets, beautiful buildings, and conservative and fresh girls.

But London is a dirty and syphilis-infested country town. It is not even as good as a more developed township in later generations. The reason why London has the civilization and magnificence of later generations is due to Germany. During World War II, German bombers almost razed London, England, to the ground, and almost all the buildings on the ground were bombed into ruins. After the end of World War II, Britain borrowed money from the United States to redesign and build London.

For example, now, Hu Xiaoyan walks on the streets full of urine and feces. From time to time, a few children rushed over with giggling and laughing. They were all stopped by Tom.

"Get out of here, stinky boys." Tom pushed the little ghost thieves away. One of the boys fell to the ground but was not annoyed, but just laughed and got up to chase the other imps.

Hu Xiaoyan smiled bitterly and shook his head, this is far from the London in his mind, when he used to go to school in London, because of the efforts of the old housekeeper, the money needed to go to school has never been less, so that he has never understood the living environment of the middle and lower classes in London. Now he knows.

This is the slum of London. The abode of the real poor, **, scoundrels and drunkards.

On the second floor of a dilapidated wooden house, Hu Xiaoyan met a haggard twenty-seven or eighteen-year-old girl with a seven or eight-year-old boy. The two of them lived in a house that was only a little larger than the toilet in later generations. Inside, there was a bed and a wooden cupboard that creaked and was about to fall. And then there was no place to stand.

When Tom pushed the door open, the girl was holding the little boy and crying silently: "I owe you money, I will pay it back!" Please give me a few more days. ”