用免漆板做衣柜教程:In western countries is it common to make appointments to visit professionals such as doctors?

yes
One of my teachers told me this.
He lived in the USA for about 5 years.
But in China, it seems not so neccesary.

Definitlly you have to make an appointment to see your doctor. Even it is an emergince you better call before you go to see your doctor.

在西方国家通常是在拜访教授/博士之前最好先预约。
在中国也是这样吗？也可以在未电话通知的对方的情况下直接去拜访一个老师吗？

在西方国家博士生拜访导师是很寻常的。但这在中国也能如此吗？没有事先打招呼就拜访导师似乎是否不合常理（不被接受）？

Yes, you have to book before your visit in western country. But is not common in China. It's not necessary because we normally do not have a family doctor. It is acceptable to visit a teacher without booking. However,it is polite to make a call. So you'd betther to do so.

In western country, the professionals like doctors and dentists their time schedules are fixed, so if you want to pay them a visit you'd better make an appointment before hand to make sure that they're free and available. If you want to visit a friend or a teacher of yours, you’d better make an appointment as well. However, in China, you can visit without calling because we Chinese think that if people are close enough it is unnecessary to make a phone call. That's where the cultural difference lies in. Chinese tend to make all people around into a family without any privacy, however, in western countries, they tend to keep their own room/ privacy even they're relatives or close friends. So a visit without an appointment means totally different in China and western countries----intimacy & rudeness.But, as time pass by, Chinese culture is influenced a lot by western countries. Chinese tend to call before visiting in order to avoid trouble and embarras