079.

China is the biggest market in the world, and many countries such as Germany, the USA, the UK and Russia do a lot of business there. Let's have a look at some important tips to help you be successful with these nationalities.
Firstly, you must be punctual with Germans. Even 5 minutes' late makes a bad impression. In the UK, it's important to be punctual for business meetings, but not for social events. Half past seven really means a quarter to eight, or even eight o'clock! With Russians, it is not unusual for them to be one or even two hours late!
In all four countries, it is best to dress formally and use dark colors. In Russia, designer clothes are very common. Don't be surprised if you go to an office in the UK on a Friday and find everyone wearing jeans. Many companies have "dress down Friday", when people wear casual clothes.
In Germany, first names are only used with family members and close friends, so be prepared to use titles and last names. In the USA you will usually be invited to use first names almost immediately.
Finally, when doing business in all countries, make sure you have a lot of business cards.
So, use these tips, and you will be on your way to a successful international business career!

參考答案：
(1) Germany
(2) social events
(3) dress down Friday
(4) first
(5) dark colors