Tang Shengxian returned to the Republic of China, he was going to go to the pawnshop to make two watches, make up some travel expenses and start-up capital in the United States, a big city is a big city, Tang Shengxian's two watches were sold for 10,000 oceans, according to the current price is 180,000 RMB, the exchange rate at this time is one dollar to 3. 114 silver dollars, Tang Shengxian went to the bank to convert all the money into dollars, but it was only 3,211 yuan.

Why would Tang Shengxian be so comfortable going to the United States? Because the hotel he lives in now is owned by an American, and he dares to do business in other countries, how can he do it without a network.

Although Tang Shengxian is an otaku, he also knows the rules that he can't do things empty-handed, bought a bottle of mid-range French wine and returned to the hotel, asked the front desk, the general manager was not there, and after getting a positive answer, Tang Shengxian walked to the general manager's office, knocked on the door, and heard a "Please come in." "It seems that this foreigner is still a China expert.

It's a guy in his fifties with a flushed face, "Nicetomeetyou, Mr." Smith: "I'm a guest of yours at this hotel, and I'd like to ask you something. "Your English is great, what can I do for you." Tang Shengxian put the wine on the table, "That's right, I stayed in England for a period of time in my early years to study, I wanted to return to China to start a business, for the benefit of the country and the people, but I didn't expect the Japanese invaded China, the country fell into a state of war, under such conditions, my knowledge and ambition can not be used, it will not play a role in the country at all, I heard that the United States of America is a country of democracy and freedom, I want to go there to open a factory, build an industry, and contribute to the development of China and the United States." ”

This passage is really emotional, Tang Shengxian deliberately practiced in front of the mirror twice before he came, and "smoothly" impressed Mr. Smith, Tang Shengxian spent 1,500 US dollars to get a first-class ticket for the Princess Marilyn that departed three days later, that is, on December 25, 1937, a US passport with his name in his name, and even a social security number that had just been put into use.

If it weren't for the fact that Shanghai was occupied by Japanese devils, where would Tang Shengxian have to spend such a big price to leave the Republic of China, wouldn't it be okay to buy a ferry ticket directly.

Time flies quickly, in the past three days, Tang Shengxian has bought a lot of food, used up all the silver dollars in his hand, and bought almost a year's worth of meals by himself, and it is not so easy to eat in the future.

Today is the Christmas of foreigners, and the hotel is also lit up, Tang Shengxian went downstairs with a small suitcase, and came to the front desk to check out, Mr. Smith was also in the hall, "Have a nice trip, Mr. Tang." "Merry Christmas to you, too." Tang Shengxian got into the car that had been waiting in front of the hotel for a while, this was a Dodge, it was the hotel car, and it was going to send Tang Shengxian to the port.

The French Concession is not far from the port, twenty minutes away, a moment, but when leaving the French Concession, he was stopped by the Japanese army, this was a routine inspection, Tang Shengxian did not get out of the car, and wanted to show the superiority of the "Americans" in front of the devils.

An ensign stepped forward and knocked on Tang Shengxian's window, Tang Shengxian slowly rolled down the window, not afraid that a second of delay would anger the Japanese, but the Japanese were very respectful to Tang Shengxian, "You drop, show your ID." Tang Shengxian handed over his American passport, and the second lieutenant carefully compared that Tang Shengxian and the person in the photo were the same person, so he returned the passport to Tang Shengxian, waved his hand, and let him go.

This may be the last line of defense to leave the Republic of China, I heard the sound of the sea, and the whistle of the pier, it seems that it is almost there.

The car pulled over, Tang Shengxian got out of the car, straightened his hat, lifted the box, took one last look at the land, and walked towards a cruise ship with Princess Marilyn without looking back, checked the ticket and boarded the ship, and came to his cabin under the guidance of the waiter, even if it was not as luxurious as the suite in the hotel, but it was luxurious enough, after all, he was not here to enjoy.

It's about nine o'clock in the morning, and it's about to officially set sail at half past nine, throwing away the last trace of discomfort in his heart, Tang Shengxian is full of hope for the future, and he firmly believes that one day, he can still come back, even if it's just a parallel world.

A melodious and long whistle sounded from the Princess Marilyn, indicating that she had set sail and that her goal was the New World.

Due to production conditions, even though the Princess is already a state-of-the-art coal-fired steamer, it still takes a full 25 days to get from Shanghai to the West Coast of the United States. Twenty-five days, almost a month, such a long time is enough for Tang Shengxian to travel back and forth between the two worlds for further preparations.

Although it is a preparation, Tang Shengxian is to understand the synthesis of those difficult polymer materials, and finally be able to complete the production. The major of polymer materials and engineering includes organic chemistry, physical chemistry, polymer chemistry, polymer physics, polymer rheology, polymer molding process, polymer processing principles, and polymer materials research methods. Master the composition, structure and performance relationship of polymer materials; Master the basic theories and basic skills of polymer processing rheology, molding processing technology and molding mold design; It has the initial ability to carry out research, design and analysis testing of modification and processing technology of polymer materials, and to develop new polymer materials and products; Ability to use a computer; It has the preliminary ability to carry out technical and economic analysis and management of polymer material modification and processing process.

However, there are so many graduates who study polymers who can meet this requirement, very few, but Tang Shengxian does not want to become an expert in this area, he only likes one of the materials, a material that is simpler than other - polyamide fiber, commonly known as nylon (Nylon), English name Polyamide (referred to as PA), density 1. 15g/cm3 is a general term for thermoplastic resins containing repeating amide groups on the molecular backbone. These include aliphatic PA, aliphatic aromatic PA and aromatic PA. Among them, there are many varieties of aliphatic PA, large yield, and wide application, and its name is determined by the specific number of carbon atoms of the synthetic monomer. It was invented by the famous American chemist Carothers and his research team.

On October 27, 1938, the first synthetic fiber in the world was officially announced, and now the time is December 25, 1937, which is already very imminent, is it still meaningful to engage in such a complex thing now? Of course, it makes sense, Tang Shengxian doesn't want to seize all the markets of DuPont, he just needs to do one business and get the patent for this product before DuPont.