Fable
The carriage workshop in the east of the city and the lane in the west of the city
Years ago there was a carriage workshop in the east of the city. The master craftsman was skilled, and every carriage was built to the customer's temperament — some carriages suited long trading journeys, with a wide driver's seat and room for cargo; others were made for delivering messages within the city, small and nimble in turns. Everyone praised his carriages, and gradually people only spoke of picking up a carriage in the east of the city, forgetting that a carriage still needs a road.
There is another lane in the west of the city, managed by the road keeper Old Chen. The lane has signals, rescue points, and weather broadcasts—only after a car enters the lane does it know whether there is a landslide ahead and whether it needs to change lanes. Old Chen never builds cars, but he can keep hundreds of cars running at the same time without colliding, and can temporarily slow down the fast lane on stormy days.
One year, a foreign merchant caravan asked a cart-making shop to build a batch of heavy-duty wagons, but after delivery they found that no matter how fast the horses ran, the wagons could not turn through the narrow alleys within the state. The cart maker felt wronged and said the carts had been made to the agreed specifications. The other party pointed to the goods piled by the alley and said: being able to run down a straight road means nothing; being able to enter and leave my alley is what counts.
This time the cart workshop understood that what they lacked was not better wood, but that they had never asked what kind of road the cart would run on. They invited Old Chen over and, before the cart was even built, told him the cart's own weight and turning radius, so that he could plan in advance how the lanes would need to change.
Old Chen was not having an easy time either. The lanes needed upgraded signal systems so every vehicle could receive real-time traffic conditions. He also set aside several dedicated lanes—some only for heavy trucks, some reserved for light express delivery vehicles. When the vehicle maker first saw the data panel, he was stunned for a long time: it turned out that even for the same vehicle, the recommended wheelbase and suspension were completely different when running on a straight road versus a mountain road.
The rule that followed was simple: when someone came to order a cart, the first step was not to draw blueprints, but to see who managed the roads the cart would run on. From then on, the cart workshop no longer promised the cart could run on any road. Instead, it honestly told customers: the cart is built here, the roads run elsewhere; I can only build for those few kinds of roads, and for other roads you must find another craftsman to fit the chassis.
The shop's accounts also became clearer. The carriage maker charged for materials and craftsmanship, while Old Chen charged for lane tolls and rescue service fees. Regular customers no longer chased the carriage shop for refunds—when a carriage had a problem, they first checked whether it was a loose screw or a collapsed road. Each craftsman handled his own part, and neither ended up carrying undeserved debt.
Years later, when new apprentices came in, the master did not teach mortise and tenon in the first lesson, but took them first to the lane station to see the complete record of a cart from leaving the shop to returning to the shop. He said only one sentence to the apprentices: Remember, the cart makers and the road keepers must reconcile accounts, but must not argue.