 The early inhabitants of the Kingdom of Maynila were engaged in trade relations with its Asian neighbors as well as with the Hindu empires of Java and Sumatra, as confirmed by archaeological findings.Trade ties between China became extensive by the 10th century, while contacts with Arab merchants reached its peak in the 12th century.During the reign of Sultan Bolkiah (1485–1521) the Kingdom of Brunei decided to break the Kingdom of Tondo's monopoly in the Chinese trade by attacking Tondo and establishing the city-state of Seludong as a Bruneian satellite.