It's important to be serious in a work situation. They don't mix work and play so you shouldn't jokes as you do in the UK and USA when you first meet people. They work in a very organized way and prefer to do one thing at a time. They don't like interruptions or sudden changes of schedules. Punctuality is very important so you should arrive on time for appointments. At meetings it's important to follow the agenda and not interrupt another speaker. If you give a presentation, you should focus on facts and technical information and the quality of your company's products. You should also prepare well, as they may ask alot of questions. Colleagues normally use family names unless a person asks you to.
