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 Distinction by dialect group has also been important historically in the administrative treatment of the Chinese in Cambodia. The French brought with them a system devised by the Vietnamese Emperor Gia Long (1802-20) to classify the local Chinese according to areas of origin and dialect. These groups were called bang (or congregations by the French) and had their own leaders for law, order, and tax-collecting. In Cambodia every Chinese was required to belong to a bang. The head of a bang, known as the ong bang, was elected by popular vote; he functioned as an intermediary between the members of his bang and the government. Individual Chinese who were not accepted for membership in a bang were deported by the French authorities.