Book excerpt: With around 30 million migrants worldwide, the ethnic Chinese and the Chinese in diaspora form the largest diaspora in the world. The economic reform of China in the late 1970s marked a huge phase of migration from China, and the new migrants have had a major impact on the local societies (including the ethnic Chinese) and on China. The transnational networks between the Chinese in diaspora and China have become even more significant as China has emerged as an economic world power.