After the Indo-Pakistani War of 1971, thousands of Biharis and Bengalis from Bangladesh arrived in the city, and today Karachi is home to 1 to 2 million ethnic Bengalis from Bangladesh (see Bangladeshis in Pakistan), many of whom migrated in the 1980s and 1990s. They were followed by Rohingya Muslim refugees from western Burma (for more information, see Burmese people in Pakistan), and Asian refugees from Uganda. One under-privileged sub-ethnic group is the Siddis (Africans – Sheedi) who are now naturalised Sindhi speakers. They are descended from African slaves. Many other refugees from the Central Asian countries constituting the former Soviet Union have also settled in the city as economic migrants. A large numbers of Arabs, Filipinos and an economic elite of Sinhalese from Sri Lanka. Expatriates from China have a history going back to the 1940s; today, many of the Chinese are second-generation children of immigrants who came to the city and worked as dentists, chefs and shoemakers.