鴨 is duck (aap in Cantonese, yā in Mandarin), so sometimes the word used is 鹹鴨蛋, salty duck egg (hàahm aap dáan in Cantonese, xián yā dàn in Mandarin)
About This Dish
Salted eggs are usually made from duck eggs, preserved by soaking in brine and then packing in charcoal, often eaten with congee. The yolk is used as the molten custard in “lava” (流沙) buns.