Fable
The Coachman Who Only Knew the Exam Road
The carriage driver A Lu was going to take the city's route-finding exam. His master gave him ten practice routes, and he ran them repeatedly every day, memorizing every tree, every stone, and every pancake stall.
Before the exam, A-Lu ran the practice routes fast and steady. The master reminded him that he was learning to recognize the roads, not to memorize them. A-Lu was confident: he had never missed on ten routes.
On the first day of formally receiving guests, the guest simply switched to an adjacent alley. A-Lu immediately panicked. During practice he turned left by the yellow dog, but today the yellow dog wasn't there; during practice he stopped at the red lantern, but every household on this street had a red lantern. He even blamed the guest for not taking the practice route, feeling the test shouldn't include alleys he'd never seen. The master had him deliver an urgent letter alone, and only then did he discover that the city doesn't open according to the practice book.
The master's first remedy was to give him twenty more fixed routes. A-Lu memorized them with more effort and became more flawless on those routes; but when he encountered a newly closed bridge, he still didn't know to read the road signs and the direction of the river. Those twenty new routes made A-Lu more like a reciter. He turned every corner into a mnemonic chant, finer and finer, yet when he hit a construction detour he panicked even more.
Only then did the master change his method. During practice, he changed the weather, the alley entrance, and the destination, and even deliberately removed familiar markers. After each run, he did not ask which dog he remembered, but asked how he judged direction, the main road, and the endpoint.
A Lu's grades dropped at first because he could no longer rely on rote memorization. A few weeks later, on familiar routes he no longer pursued zero error on every detail, yet he could still deliver unfamiliar passengers to their destinations. The master then deliberately had different passengers state different destinations: some said a shop name, some said a street corner, some only remembered a locust tree by the entrance. A Lu had to confirm the target first, then choose the route.
Later, A Lu did not stop noting markers entirely. The master told him to treat markers as aids, not as the rule itself. A yellow dog or a red lantern could serve as a reminder, but what truly determined the turn should be the street name, the direction, and the destination.
The master said that a truly good driver does not seek perfection on old problems, but must remain steady even on new roads never seen before. Treating accidental markers as patterns—the more practiced, the more dangerous it becomes on the road.