Fable
Fire brigade and archive
The money house feared the accounting office would catch fire, and the shopkeeper asked two things. The head of the accounting office managed two seemingly similar matters: one was how soon they could reopen for deposits and payments, and the other was how far back in the accounts they could afford to lose. The new clerk found it troublesome and merged the two ledgers into one, thinking it was all related to success or failure anyway.
At first no one objected. The clerk merged the two questions into "backups should be good," bought an iron box, and felt at ease. The shopkeeper saw fewer pages and even praised them for saving trouble. But when peak season arrived, the old accounts suddenly could not be explained clearly: whether the previous batch had not been finished or the next batch had not been held, no one could answer.
They first added more seals and slogans and required everyone to write in more detail. As a result, the booklet grew thicker and disputes increased. When something went wrong, everyone could find a sentence to excuse themselves, but no one knew which end to save first.
The old steward called everyone into the courtyard and had them retrace the actual course of events. Whatever concerned the immediate action went into the first book; whatever concerned subsequent responsibility went into the second. The two books referenced each other, but were no longer mixed onto the same page.
After the fire, the iron box preserved the accounts from three days earlier, but the counter could not be rebuilt in half a day, and yesterday's transactions could not be recovered. Once separated, many old conclusions changed: some activities looked busy but had not actually blocked trouble; some arrangements were unremarkable in normal times yet preserved the whole in disaster.
To prevent newcomers from mixing things up again, the old steward had them each handle a small case. Only when the two ledgers could each answer their own questions and also connect with each other at the boundary would the small case pass. If someone still wrote the two matters on one page, they had to return to the scene and look again at who acted first and who was ultimately responsible; when it was unclear, it was better to ask once more than let a muddled account stay overnight; because on the day something truly went wrong, one missing line of distinction would make an extra team work in vain.
The shopkeeper set separate rules: the counter had to be able to open temporarily within one incense stick's time, and the ledger had to be copied next door every half shichen. Later, when newcomers entered the trade, the old steward had them memorize just one line: recovering quickly and losing fewer old accounts are two different rulers.