two-thirds of the population are migrants. The predominant ethnicities are Malays, Javanese, Batak, Minangkabau, and Chinese. As a municipality it exemplifies the national motto of "Bhinneka Tunggal Ika" (Unity in Diversity). The location of Batam, which is close to Singapore, is conducive to the development of economic, sociopolitical, and cultural aspects of the local community. Religion Islam is the majority religion in Batam, followed by Christians, Buddhists and Hindus. Most of those who follow Islam are Javanese, Malays and Minangkabaus. The Great Mosque of Batam, located in the city center adjacent to the main square, the mayor's office and the provincial Parliament, is an important symbol of Islamic religious life in Batam. Christianity is also widely embraced by people of Batam, especially those from the Batak people of Sumatra and migrants from Flores also from East Indonesia. The majority of the Chinese population practises Buddhism. A number of Viharas are located in Batam, of which Vihara Duta Maitreya is one of the most frequented, and is the largest Vihara in Southeast Asia with an area of 4.5 hectares. Language Indonesian is the common lingua franca of Batam in daily use. Other languages such as local Malay (similar to the Malaysian standard as spoken in neighbouring Malaysia and Singapore), Minangkabau, Batak, Javanese, and Chinese ethnic dialects like Hokkien and Teochew are also used. The usage of Mandarin and English are trending due to Singaporean influence, especially by expatriates living in Batam. Economy Based on Presidential Decree No. 41/1973, the Batam Industrial Development Authority (BP Batam) was established to manage 415 square kilometer industrial complex in Batam City for heavy industry. Previously only Pertamina, the Indonesian state oil company, settled there with only 6,000 inhabitants. Shipbuilding and electronics manufacturing are important industries on the island. Being located close to the ports of Singapore, the speed of goods shipping and product distribution is increased, benefiting the island's economy. With lower labor costs and special government incentives, it is the site of many factories operated by foreign companies. Under a framework signed in June 2006, Batam, along with parts of neighbouring Bintan and Karimun, are a part of a Special Economic Zone with Singapore; this zone eliminates tariffs and value-added taxes for goods shipped between Batam and Singapore. In 2007, Law No. 44 was enacted to supplement Law No. 36/2000 in establishing Batam as a free trade zone for 70 years. BP Batam still