Langzhong, the Sichuan river town that kept its courtyards lived-in

The bus sets you down outside the wall, and for a moment the old town gives nothing away — a ticket booth, a rack of shared electric scooters, a woman halving pomelos on a cart. Then you step under the gate and the street drops to the width of two sedan chairs, the wooden shopfronts lean in overhead, and behind a lattice window someone is scalding a teapot with the day's first kettle.

A town the river drew first

Langzhong (阆中) sits inside a near-complete loop of the Jialing River (Jialing Jiang 嘉陵江), about 300 kilometres northeast of Chengdu, with hills shutting the other three sides. The Tang-era surveyors who laid it out treated that geography as a diagram to be obeyed, so the streets run true to the compass rather than to the riverbank.

At the crossing of the four main lanes stands Zhongtian Tower (Zhongtian Lou 中天楼), a three-storey wooden corner tower rebuilt on its old footing. Climb the steep interior stair, pay nothing extra for it, and the grid reveals itself — grey tile roofs stepping downhill in straight rows toward the water, with Jinping Shan (锦屏山) rising green on the far bank. Stand there long enough and you understand why the town has been called a textbook of old Chinese geomancy: every axis points somewhere on purpose.

The courtyards people still sleep in

Most of Langzhong's lodging is not a hotel but a siheyuan (四合院) — a Qing-dynasty residence built around a small open court, converted room by room into an inn. Along Xiahua Jie (下华街) and Wumiao Jie (武庙街) the doorways open onto grey-brick yards with a stone water trough, carved wooden screens, and a low table already set with a tea tray. A plain double room runs roughly 150 to 300 yuan a night, less on a weekday in the off-season, and the owner will usually pour you tea before you have decided whether to stay.

What keeps these lanes from feeling like a film set is that many of them are still houses. The couplets flanking the doors are brushed by hand, not printed, and repainted each new year. Push past the renovated stretch near the tower and you find a grandmother shelling broad beans on her own step, washing strung on a bamboo pole between two eaves, a cat asleep on a coal briquette stove gone cold.

古城里的四合院大多仍有人居住，不只是客栈。

Vinegar you can drink, beef the colour of lacquer

Langzhong's signature is not a dish but a condiment. Baoning vinegar (Baoning cu 保宁醋) has been brewed here since the Ming, fermented with a cake of dozens of herbs rather than plain grain, and it comes out dark as soy and faintly medicinal. Shops along the main streets sell it by the jar from 15 yuan up, and some keep a small cup on the counter so you can taste it neat — locals will tell you, without irony, that they drink a spoonful in the morning.

The other name to know is Zhang Fei beef (Zhang Fei niurou 张飞牛肉), cured so the crust goes near-black while the centre stays deep red, after the Shu-Han general once garrisoned in this valley. It is sold by weight, vacuum-packed, commonly around 40 to 60 yuan for 250 grams, and the open bowls in the market let you try a slice before you commit. Sit down for a bowl of the local cold noodles dressed with that vinegar and chilli for under 15 yuan, and you have eaten the town twice over.

The place is busiest at noon and most itself around nine, when the coaches are back on the expressway and only the residents are left under the lanterns.

The examination hall and the keeper of the calendar

For all its quiet, Langzhong kept two things most old towns lost. The Gongyuan (贡院) is a rare surviving Qing imperial examination compound — rows of narrow roofed cells where candidates were sealed in for days, laid out around courtyards you can walk through in half an hour. It sits inside the old-town attraction pass, which bundles the main sites for around 100 yuan.

The second is older still. Langzhong was the home of Luoxia Hong (落下闳), the Han-dynasty astronomer who helped set the Taichu calendar that fixed the lunar new year, which is why the town markets itself as a birthplace of Spring Festival custom. A short walk west brings you to Han Huanhou Ci (汉桓侯祠), Zhang Fei's temple and burial mound, its halls smelling of cypress and old incense. Between the two you have covered roughly seventeen centuries without leaving the wall.

Getting in, and the one thing to get right

The cleanest arrival is by train to Langzhong station (阆中站) on the Lanzhou–Chongqing line, with through services from Chongqing and connections via Nanchong from Chengdu; from the station a taxi to the old-town gate is a short, cheap ride. Long-distance buses from Chengdu's Beimen terminal take around four hours and drop you close to the wall. Spring and autumn are kindest — summer in the Sichuan basin is heavy and wet, and the town is thinnest of visitors on weekday mornings.

The mistake to avoid is treating Langzhong as a day trip. Almost everyone does, which is exactly why you should not: the coaches clear out by late afternoon, and the reason to come — lantern light on empty stone lanes, a courtyard to yourself, a pot of tea that nobody is hurrying you through — only arrives after they are gone. Book a night in one of the siheyuan, and let the town close around you.