There's a stretch of the Pearl River delta where the air smells of wheat and salt by 6am. That's because — across half a square kilometre of Xinhui, on the same site Mr Lee Kum Sheung first started brewing oyster sauce in 1888 — Lee Kum Kee is still doing what it always did. Every morning. Every batch.
What's remarkable about a producer like this isn't the volume (though the volume is, frankly, staggering). It's the fact that the soy sauce on the shelf at your supplier in Glasgow began as soybeans soaked in water, four days ago, in vats your great-grandfather might have walked past.
The temptation, at scale, is to short-circuit. Caramel colour instead of the slow oxidation that gives traditional dark soy its colour. Hydrolysed protein instead of the months-long ferment. Lee Kum Kee don't do this — and once you've cooked with the proper version, you can't unknow the difference. The premium dark sauce we stock is the same recipe used in Cantonese restaurants in Hong Kong, Vancouver, Sydney and Singapore.
If you're choosing a soy for a marinade or a red-cooked dish, this is the one. It carries colour without aggression, salt without flatness, and a low umami floor that lets the other ingredients sing.