In the 13th century, the famous Italian traveler, Marco Polo, traveled a long way to China. During his stay in China, he saw many wonderful things. One of the things he discovered was that the Chinese used paper money. In Western countries, people didn't use paper money until 15th century. However, people in China began to use paper money in the 7th century.

A Chinese man called Cai Lun invented paper almost 2,000 years ago. He put these pieces of paper together and made them in a book.

Now paper comes from trees. We use a lot of paper every day. If we keep on wasting so much paper, there will not be any trees left on the earth. If there are no trees, there will be no paper. So how can we save paper? We can use both of every piece of paper, especially when we are making notes. We can choose drinks in bottles instead of those in paper packets (小包). We can also use handkerchiefs (手帕) and not paper ones. When we go shopping, we can use fewer paper bags. If the shop assistant does give you a paper bag, we can save it and reuse it later.

Everyone can help to save paper. If we all think carefully, we can help protect trees. We should do it now before it is too late.

The first chocolate was enjoyed by people in Central and South America many years ago. In those days, the coca bean (可可豆) was used to make a chocolate drink.

In 1824, Mr. Cadbury opened a small shop in the United Kingdom. He sold chocolate drinks. In 1831, he opened a factory to make chocolate drinks. Mr. Cadbury believed that the wine was bad and he wanted to encourage people to drink chocolate instead. A few years later, man invented a way to make chocolate bars (块), so people had the chance to eat chocolate instead of only drinking it.

At first, only dark chocolate was made. Milk chocolate came later and it was made by adding milk to the chocolate. Mr. Cadbury made their first milk chocolate bar in 1897. Their most famous chocolate, Cadbury Milk Bar, was made in 1905. It has been popular for over 100 years. The Cadbury factory still makes chocolate in the United Kingdom, and the chocolate is eaten all over the world. Every year, quite a few visitors go to the factory to see how chocolate is made.

Tea is important part of Chinese tradition. Tea has very close relationship to Chinese culture.

It is said that Chinese tea was discovered by King Shen Nong(神农). People say that he lived 5,000 years ago. One summer day, while he was visiting a faraway part of his country, he felt very thirsty. The servants began to make water hot enough to turn into gas for him to drink. Dried leaves from a near plant fell into the water. The king drank some, and found it could make him feel less tried. Also as a scientist, Shen Nong was interested in the new drink. And so, tea was created in 2737 BC.

Drinking tea has many advantages. It makes people feel less tired, clears heat inside the human body and helps people lose weight. As you add a cup of tea to your daily life, please check the following helpful advice drink it hot. Tea oxidizes(氧化) quickly, so it is suggested that you drink it hot. Sick if you make the tea too strong.

Your stomach is full. You take medicine.

Do not drink too much strong tea. It will probably be harmful to your stomach and make you feel uncomfortable. The best time to drink tea is between meals. It may not make you have a strong wish to eat. Do not drink with medicine. It many change the medical result. You can drink tea two hours after.

Green tea is the best choice for office workers. Why? Because green tea helps stop the bad result of the computer.