When is a dollar worth much more than a dollar? When can a mistake make something worth much more? What gets more valuable with age? Numismatic experts love to discuss these questions!

When most people consider the value of paper money, they take a quick look at the face value. (The face value is the value printed on the money itself.) A numismatic expert takes a much closer look!

Becoming a numismatic expert requires attention to details. There are many words, pictures and numbers on each dollar bill. One thing a numismatic expert will consider when looking at paper money is the type of currency (货币). At the top of most U.S. dollars, you will see the words Federal Reserve Note. On a very small number of bills, you may see the words Silver Certificate. Before 1968, a Silver Certificate could be changed for silver. So don’t spend that bill because it is probably worth more than a dollar.

Next, a numismatic expert is likely to take a look at the serial numbers on the bill. The serial number is printed both on the bottom left and on the upper right of most U.S. dollars. If the serial numbers do not match, the dollar bill is worth much more than a dollar. Bills with certain serial numbers are also likely to be worth more than their face value. For example, a bill with a repeating serial number, such as 5555555 is in high demand. This makes it worth much more than a dollar. A bill with an asterisk (*) before the serial number notes that there was an error before production of the bill. This asterisk often makes the bill more valuable.

If any of the numbers or pictures on a dollar bill are shifted, not printed exactly where they should be, the value of the bill increases greatly, which makes it have a very high collection value. There is much more to learn about numismatics. If you would like to become a numismatic expert, the first step is to take a closer look at the money that passes through your hands. Good luck!

In Britain you’re allowed to drive a car when you’re seventeen. You have to get a special two-year driving license before you can start. When you’re learning, someone with a full license has to be in the car with you because you aren’t allowed to drive the car on the road alone.

Before you’re allowed to have a full license, you have to take a driving test. You can take a test in your own car, but it has to be fit for the road. In the test you have to drive round for about half an hour and then answer a few questions. If you don’t pass the test, you’re allowed to take it again a few weeks later if you want to. When you’ve passed your test, you don’t have to take it again, and you’re allowed to go on driving as long as you like. Britain’s oldest driver was a man who drove in 1974 at the age of 100.

Before 1904 everyone was allowed to drive, even children. Then from 1904 car drivers had to have a license. But they didn’t have to take a test until 1935. On the early days of car driving, before 1878, cars weren’t allowed to go faster than four miles an hour, and someone had to lead the car with a red flag.

①Traveling (旅游) by train is a great way to go around China. It is faster than driving or taking a bus. It is more comfortable than taking a plane. It’s also more relaxing to take the train. On a train, you can sit and enjoy beautiful things along the way. You can use your phone freely. Also, trains can run even in the rain and snow.

②There is a very popular kind of train in China —high-speed (高速的) trains. Two of the top high-speed trains are Fuxing trains and Hexie trains. They can move far away in the blink of an eye. But do you know which one is faster?

③Fuxing trains are the fastest trains in China. They can go up to 400 km/h. Also, Fuxing trains are more comfortable than Hexie trains. They have better seats, free Wi-Fi, more charging ports (充电接口) and more legroom (放脚空间) . What’s more, Fuxing trains look more beautiful than Hexie trains and the design (设计) working life of Fuxing trains reaches 30 years, 10 years longer than Hexie trains.

④Hexie trains can go up to 350 km/h. They are not as fast as Fuxing trains, but they are also very comfortable. They don't have as many special features (特征) as Fuxing trains, but they still take you where you need to go fast and easily.

⑤So, which train do you like better, Fuxing or Hexie? No matter (不论) which one you choose, you will have a great time traveling by train in China. Just give these high-speed trains a try, and you will fall in love with them.

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