Each year the school sends 10 selected secondary school students from Year 10 to 13 to the Model United Nations event that is held in Beijing in March. Hence it is also known as the BEIMUN Conference. The conference is held over several days and students attend from schools from all over the world. There are also other MUN conferences that are held in other world regions. The students are involved in various committees, as would be the real UN, to discuss major global issues. They have the opportunity to bring forth resolutions at the conference which are then discussed and voted on. To prepare for the MUN the students attend a MUN ASA slot in term 2, and if possible visit the embassies of the countries that they are to represent and a non-governmental agency. The students from BSB have represented Switzerland, Djibouti, Turkmenistan and Hungary. They have also visited the Book Worm, UN World Health Organisation Beijing Office and the BBC Beijing news centre.