gradual simmering

maca, 馬卡
Korean ginseng, 高麗參
American ginseng,花旗參
red date, jujube, 紅棗
Sichuan fritillary, 川貝
dendrobe, 石斛
snow fungus, white wood ear, 雪耳
cordyceps flower, 蟲草花
shiitake mushroom, 冬菇
ophiocordyceps sinensis, yarsa-gumba, 冬蟲夏草, 蟲草
tortoise plastron, 龜板
crocodile flesh, 鱷魚肉
dried gecko, 蛤蚧
dried seahorse, 海馬
deer tendon, 鹿筋
deer tail, 鹿尾羓
deer velvet, deer anthler, 鹿茸
e jiao, donkey hide glue, 阿膠
sea cucumber, 海參
edible bird's nest, 燕窩
slate cod croaker fish maw, 鰵魚花膠
dried scallop, conpoy, 江瑤柱

Here is the food that could be cooked by gradual simmering.