This is often ash from the lye that arises from the wood around the Cham Islands which happen to be around twelve kilometers from your Coastline of Hoi An. source: citypassguide Hoi An’s Japanese Lined Bridge, relationship back to the 18th century, is Probably the most iconic sights in Vietnam. https://codyillkj.pages10.com/the-5-second-trick-for-hoi-in-an-70316655