By 2004, increased international business operations resulted in an increase of foreign children. Many of the original post-1949 international schools used International Baccalaureate and North American curricula. By 2004 many international schools in Beijing and Shanghai using the British curricula had opened. The number of international schools in China grew from 22 schools in 2001 to 338 schools in 2013; over the same period, enrollment in international schools rose 25 times to 184,073 students. By the 2010s, many Mainland Chinese parents began sending their children to international schools that accept Mainland students to increase their children's chances of going overseas.