Henan · A Canal Cut Along a Cliff by Hand
Red Flag Canal (红旗渠)
A canal cut and built along the cliffs of the Taihang mountains in the 1960s to bring water from a river in the next province into a county that did not have enough. It was done with hand tools. It is now a national patriotic education site as well as an engineering one, and both of those are visible on a visit.
Quick Facts
The Short Version
| What it is | A contour canal carried along cliff faces and through tunnels, built to divert river water into a dry county |
|---|---|
| Where | Linzhou, in the Taihang mountains of northern Henan, near the Shanxi border |
| When | The 1960s. It was built largely by hand, with the local population as the labour force |
| Why | The county had chronic water shortage. The nearest reliable river was across the mountains in the next province |
| How it works | It runs along the contour at a height, so water reaches the fields by gravity rather than being pumped |
| What it is now | A scenic area and a national site for patriotic and school education, with a memorial museum |
| Also here | The Taihang gorge country the canal was cut through, which is the other half of the listed area |
| Time needed | A day. Half of that is the canal and half the museum and the walkways |
Why Go
A Ledge of Water on a Cliff
1. What the pictures are actually showing
A canal is not usually a spectacle. This one is, because of where it had to go. The picture at the top of this page is a stone-lined channel following the contour of a hillside and turning a ridge nose in a sharp V, which is what a waterway does when it cannot go over or under and has to go round. Another image below shows the same line traversing a stepped limestone cliff with a valley, a river and terraced fields far beneath it.
That second picture explains the whole project in one frame. The water is up on the cliff and the farmland is down in the valley, which means the canal can deliver by gravity to ground that had no reliable supply of its own. Getting the water to that height, and keeping it at a gradient gentle enough to flow but steep enough not to stop, is the engineering problem, and it is why the channel takes such a long way round.
2. It was dug by the people who needed it
This corner of Henan sits in the rain shadow of the Taihang and had a long recorded history of drought. The solution adopted in the 1960s was to take water from a river on the far side of the mountains, in Shanxi, and carry it back through and along the range. The work was done with hand tools, by the county’s own population, over a period of years, and it involved cutting channels into vertical rock and driving tunnels through spurs.
The human cost is part of the record and the figures vary between accounts, which is why this page gives none. What is not in dispute is the scale of the effort or the fact that it worked: the county got its water. For a foreign visitor the interest is that this is infrastructure of a kind that is normally invisible, made visible because it had to be built on the outside of a mountain.
3. What the site is used for now
The canal is also a national site for patriotic education, and that is not a footnote. The film these pictures come from shows school groups in uniform crossing a bridge in column, costumed demonstrators cutting stone with hammer and chisel, a memorial museum, and a row of red steel silhouettes of workers with tools set along the canal wall, which is one of the pictures below.
This page describes that rather than judging it. Every country turns some of its infrastructure into national story, and what a visitor gets here is an unusually clear view of the process: the engineering is genuine and impressive, the presentation is deliberate and organised, and both are in front of you at the same time. Knowing to look at both is the difference between an interesting day and a puzzling one.
The catch. A great deal of the site is a museum and an interpretive experience rather than the canal itself, and it is presented entirely in Chinese. School and study groups arrive in numbers and fill the walkways at the popular sections. The canal walk is a narrow railed path with a drop on one side, which not everyone will enjoy. And the surrounding gorge scenery is a separate part of the same listed area, so doing both properly needs more than a day.
Orientation
The Canal, the Museum and the Gorge
The visit has three components. The canal itself is walked at a section where a railed path runs beside the channel along the cliff, including the best known tunnel. The memorial museum is separate, lower down, and covers the construction. The Taihang gorge scenery is a further area again, with its own valleys and walkways.
Most visitors do the canal section and the museum, in either order, and a day covers that comfortably. Adding the gorge means a second day. Working out in advance which parts are on the ticket and how far apart they are is worth doing, because the components are not within walking distance of each other.
Practical
Things Worth Knowing
Do the canal before the museum
Seeing the channel on the cliff first makes the museum legible. The other way round it is a lot of text about something you have not looked at yet.
Avoid term-time mornings if you can
School groups are a large part of the traffic and they arrive together.
Trace the line in the wide views
From the viewpoints the canal reads as a thin horizontal mark across the cliffs. Following it with your eye is the moment the scale lands.
Treat the gorge as a separate trip
It is the same listed area and a different day out. Trying to do both in an afternoon does neither any good.
Timing
When to Go
| Season | The case for | The catch |
|---|---|---|
| April to June | Green hillsides, comfortable walking on the exposed canal path and long daylight | Spring in northern Henan is dusty and can be hazy |
| September and October | The clearest air of the year and the best views along the line of the canal | The first week of October is a national holiday and the walkways fill |
| July and August | Everything green and the water at its fullest, which suits the subject | Hot, and this is the school holiday season with study groups in numbers |
| November to March | Quiet, with bare slopes that make the channel much easier to pick out | Cold and exposed on the cliff path, and ice forms on the rock faces |
Context
Water, and Where China Does Not Have It
The basic fact about water in China is that it is in the wrong place. The south has most of it and the north has most of the farmland and a large share of the population, and the gap between those two things has shaped Chinese statecraft for a very long time. Grand Canal grain transport, the Yellow River dykes, the modern south-to-north diversion scheme: these are all responses to the same imbalance at different scales.
This canal is a local version of that problem. Linzhou sits on the dry eastern flank of the Taihang, the rain that does fall runs off fast, and the county had no dependable surface supply. The available water was on the other side of the range. Moving it meant either pumping, which needs power the county did not have, or building a gravity channel the whole way round the mountains, which needs labour it did have.
That choice is the reason the canal looks the way it does. A gravity line has to hold its gradient regardless of the terrain, so it follows every contour, turns every spur, and goes through anything it cannot go round. What you are looking at on the cliff is the shape of that constraint. This guide covers the older and larger version of the same idea at Dujiangyan.
Nearby
Other Stops on the Same Trip
Spot · about 200 km southwest
Shaolin Temple (少林寺)
The Chan monastery in the Song mountains, and the other reason most visitors are in Henan.
Spot · about 220 km south
Longmen Grottoes (龙门石窟)
The cliff-cut Buddhist caves at Luoyang, a very different kind of rock cutting.
Spot · about 230 km south
Yuntai Mountain (云台山)
Gorges and waterfalls in the same Taihang range, further down.
Where to Base
Anyang (安阳)
Anyang is the prefecture city and the rail point for this corner of Henan. It has a claim on any itinerary in its own right, as the site of the late Shang capital and the place where the oracle bone inscriptions were found, which makes it one of the foundational sites of Chinese archaeology.
Pairing the two is a genuinely odd and rewarding day or two: Shang oracle-bone script, and a 1960s hand-dug canal, within an hour of each other. Very few foreign itineraries come to this part of the province at all.
Experiences
What You Can Actually Do Here
On site · one day
Canal and museum
The cliff section of the channel and the tunnel in the morning, the memorial museum afterwards, in that order.
On site · two days
Canal and gorge
The canal on one day and the Taihang gorge scenery on the other, which is the whole of the listed area rather than half of it.
Guided · 4 days
Northern Henan, Shang and modern
The Shang capital and the oracle bones at Anyang with the canal in the mountains behind it, read as two ends of the same question about making a place habitable.
Go and trace the line with your eye. What is here is a water channel built along the outside of a mountain range in the 1960s with hand tools, because the county needed water and the water was on the other side. In the wide views it reads as a thin pale mark running level across cliffs that are anything but, and that mark is the whole story. It is also a national education site with a museum, school groups and steel silhouettes of the workers along the wall. Both of those are the place, and it is worth seeing both.
Henan, the Part Nobody Visits
This canal is one of the more remarkable pieces of twentieth-century infrastructure anywhere and almost no foreign itinerary includes it. Tell us your dates and our local team will get you onto the cliff section, through the museum in the order that makes sense, and over to the Shang capital an hour away.