What I gathered was they closed the lid and walked away for a year & 1/2.
Then, start filling the next one. The place where they made it had several.
And somehow, when one tank was drained and emptied, I have my doubts about how well it was
cleaned and steralized before being filled again.
I'm good with the Asian Soy Sauces, and even those hot sauces that make you feel like a fire breathing dragon,,,
but those other 'sauces' -- like those rotten chicken eggs in the Philippines,,
they're a bit much for me and my delicate sensabilities.