China — nationally produced; major centres in Guangdong, Fujian, Zhejiang
Chinese soy sauce exists on a spectrum: light soy (sheng chou) — thin, salty, for seasoning and marinades; dark soy (lao chou) — thick, sweet, for colour and braising; double dark or premium (shuang huang chou) — aged, complex; mushroom soy — infused with shiitake. Each variety serves a distinct culinary function and cannot be interchanged without fundamentally altering a dish.
Light soy: salty, umami, slightly sweet; Dark soy: molasses-sweet, light salt, caramel; Premium: complex layered fermented depth
{"Light soy: primary seasoning soy; high in salt (15–20%), used for all-purpose seasoning","Dark soy: 40–50% lower salt content but contains molasses; for colour in braises, not seasoning","Premium soy (yi pin xian, Pearl River Bridge gold label): aged 3+ years, used sparingly as condiment","Mushroom soy: adds additional umami layer; good for stir-fries needing depth","Never use dark soy as seasoning — saltiness is insufficient and colour will be wrong"}
{"Lee Kum Kee Premium is a reliable benchmark for light soy; Pearl River Bridge for dark","In Hong Kong-style cooking, a splash of dark soy alongside light soy is a standard technique","Aged premium soy drizzled cold on tofu is a standalone dish requiring nothing else"}
{"Using Japanese tamari interchangeably with Chinese light soy — different flavour profile","Confusing light colour with light salt — dark soy is actually lower in salt than light soy","Using only one type of soy when recipe specifies both — dual soy technique is intentional"}
The Food of Sichuan — Fuchsia Dunlop