text: During the reign of Sultan Bolkiah from 1485 to 1521, the Sultanate of Brunei having seen the feature of the land as a natural port, the Brunei Sultan tried to have a part of Tondo's the incoming China trade by attacking its environs and establishing its own Sultanate of كوتا سلودوڠ Kota Saludong/ Selurong, now Manila ruling under and giving yearly tribute to the Sultanate of Brunei as its satellite state.