Built during the Yongle reign of the Ming Dynasty, Rooster Post once stood as the liveliest relay on the western road out of the capital. Courier horses shattered the morning frost; messengers sped under urgent orders. In the thunder of hooves racing eight hundred li, the flames of war and the emperor’s edicts were borne across the land. Today, the scene atop the walls has changed. Beyond the battlements, rails wind toward distant mountains, and two trains pass in opposite directions, their whistles breaking the stillness of the ancient post. Six centuries ago, vast distances were measured by hoofprints; now, a thousand kilometers can be crossed between dawn and dusk.
