Official booking, this is an international territory, there are Chinese guides, but we ordered in English, Chinese group is still relatively small. It is suggested to arrive 1.5 hours in advance. First, we need to go to the opposite office to get the certificate. The queue is not the most, but the efficiency is very slow. Then we enter the building at the security check. I arrived half an hour in advance. As a result, I missed my group and could not change to the next one free of charge. We need to buy the tickets again. Later, the staff paid me four children's tickets! It's their fault, but there's no way you can't get in. The whole trip lasts about an hour. Take you to the parliament hall. If there are meetings in it, you can't go in. And explain the function of the United Nations, in fact, the theme is love and peace. It is especially recommended to send postcards in the United Nations, where you can customize stamps that belong to your own photos, and United Nations stamps can only be sent from there, if you take them outside the mailbox can not be sent. In addition, you can stamp the United Nations stamp on your passport, which is very meaningful! There are restaurants in the United Nations, just like IKEA's: 20USD/Person Policy: Passport-carrying, irrevocable, Self-Access to the official website: visit.un.org