The wall is not one thing
The first correction this day makes is scale and authorship. The Ming wall alone runs 8,851.8 kilometres, according to the survey measurements published by the State Administration of Cultural Heritage in 2012; all the dynasties' walls together come to 21,196.18 kilometres. Within Beijing municipality there are 520.77 kilometres of wall, 147 passes and forts and 1,742 individual structures. Nothing about that was built by one emperor or in one century, and the section we use as our classroom - Mutianyu, in Huairou - is a good place to see how much of the wall was rebuilt rather than built.
Morning - the rampart itself
There was a wall here in the Northern Qi period, in the sixth century. The Ming work began in 1368 when the general Xu Da was ordered to strengthen the passes on the site of the older wall, and a gate was built in 1404. But the section you walk today took its present form in the 1560s under the two men who are responsible for most of what visitors recognise as the Great Wall: the commander Qi Jiguang and the governor Tan Lun, who were posted to the Ji garrison in 1568. Qi Jiguang's contribution was technical, and it was twofold - he faced the wall in brick, which made it far more resistant to weather and to battering than the rammed earth it replaced, and he introduced the hollow watchtower, a two-storey structure built astride the wall with quarters for a garrison and space to store weapons and powder, so that soldiers no longer had to live in the open on the parapet. Over sixteen years more than a thousand of these towers were built along the Ji garrison. At Mutianyu the record notes twenty-two hollow towers, forty-four rooms, three offices and 149 subsidiary shelters, completed in the autumn of 1571.
Midday - reading the fabric
On the wall itself we work through the anatomy: the outer parapet with its crenellations and firing holes, the inner parapet without them, the walkway and its drainage, the bases and the spacing of the towers, and the siting of the whole line. Your guide explains the two problems the wall was built to solve and how differently it solved them - stopping a mounted force, and knowing that it was coming. Watchtower spacing is about visibility and signalling rather than about defence in depth, and once you have walked three or four towers in a row with a guide who knows what to look for, the logic of the distance between them is obvious and the romance of the wall is replaced by something more interesting.
Lunch
Lunch in the village below the wall.
Afternoon - supply, garrison and the cost
The afternoon is a discussion on the ground rather than a walk: where the water came from, how food and gunpowder were carried to towers that are two hours' climb from a road, what a garrison was paid, and what proportion of the Ming state's revenue the whole system consumed. We finish with the section's own history as a heritage site - the restoration campaign, the balance between making a structure safe for visitors and falsifying it, and why a well-known stretch nearby is deliberately left unrestored and out of bounds. Students should bring notebooks; the day is designed so that it can be written up afterwards.
Suitable for
Secondary and university groups. The walk is three to four kilometres with a steep ascent and descent and roughly three hundred steps; there is a cable car to the ridge, which most groups use in one direction. The wall is fully exposed to sun and wind.
Meals
Lunch
Accommodation
Day programme - no hotel night included.
