The port town of H?i An and its bridge during the 18th century. Watercolour engraving by Jacques Chereau (1688-1776), circa 1750. H?i An's significance waned sharply at the end of the 18th century due to the collapse of Nguy?n rule, which resulted through the Tây S?n Rebellion - which was opposed to overseas trade.Xu h??ng qu?ng cáo ngoài tr?i (