The frame comes first, and almost nobody looks at it. In a workshop behind Trần Phú, a man sits on a low stool with a length of bamboo across his knees and splits it lengthways with a blade the width of a thumb. Twelve ribs for the round lantern, sixteen for the garlic-bulb shape, eight for the plain drum. The ribs have already spent days in salted water so the beetles leave them alone, and they are still faintly damp, still green at the edge. He bends each one against the grain until it takes a curve and holds it, then fits both ends into a pair of wooden discs no bigger than a coin. A sliding ring locks the whole thing open. Push the ring the other way and the lantern collapses flat, like a closed umbrella.
That collapsing frame is the reason lanterns from this town travel. Anyone can glue silk onto a hoop. The folding skeleton is what turned a household object into something a merchant could pack in a crate, and it is why every second shop on Nguyễn Thái Học now sells the same silhouette in eleven colours.
Silk, glue, and the part that goes wrong
The covering is cut on the bias so it stretches over the curve without wrinkling. Some workshops still use silk woven up the Thu Bồn at Mã Châu, in Duy Xuyên, where the looms have been running for generations and the thread comes off mulberry-fed worms; most use polyester now, because it holds colour under sun and does not rot in the wet season. Ask which you are holding. The honest answer is usually polyester, and the person who made it will tell you so without embarrassment.
The glue is a rice or cassava paste, cooked and cooled, brushed onto the ribs only. It goes on thin. Press too hard and the silk dimples between the ribs and the lantern will read as cheap from three metres away, which in the end is the only distance that matters. The first one a visitor makes almost always dimples. The second is usually acceptable. Nobody makes a good one on the first afternoon, and the workshops that promise otherwise are selling a pre-built frame with a bow tied on it.
Watch the hands rather than the finished object. There is a small rotation of the wrist as the silk is laid down — pull, tack, smooth away from the seam — that takes about a year to acquire and half a second to perform.
The fourteenth night
Once a month, on the fourteenth day of the lunar cycle, the old town cuts its electric light. No motorbikes on the riverside streets. Households set small altars out on the pavement with incense and marigolds, and the light drops to the colour of weak tea, which is what silk and a candle actually produce when there is nothing brighter to compete with. The wooden shophouses stop being brown and go the colour of honey. You can hear the river, which on any other night is inaudible under engines.
The floating lanterns are a different object from the ones in the workshops — paper cups on a folded card base, a stub of candle, sold from trays at the Bạch Đằng steps. A boat is rowed out, you set them on the water, and they turn slowly in the current until the wax drowns. Four minutes, sometimes five, depending on wind.
It is worth knowing what happens next, because the marketing photographs stop here. Downstream, women in flat boats scoop the spent paper cups out of the water with long nets. Some are dried and sold back to the tray-sellers. Some go in a sack. The river is not left carpeted in candles at dawn; a small economy exists to make sure of that, and it is run almost entirely by women in their fifties and sixties working after ten at night. Knowing it does not spoil the gesture. It changes it from a wish into a transaction with people in it, which is more interesting.
Where we put you, and why
We keep this group to fourteen, and on the water we split into small boats rowed by families who work the Bạch Đằng steps, going upstream against the drift rather than joining the press below the Japanese Bridge. Upstream you get the reflections without the queue of hulls knocking together, and you can hear the oar. The workshop visit happens in the afternoon, in a family house rather than a shopfront demonstration, because the cutting and the bending are the parts nobody stages for an audience and they are the parts that explain the object.
The blackout night falls on the fourteenth of the lunar month only, so most itineraries land on an ordinary evening instead. An ordinary evening is still good — the town is simply louder, and the light has competition. If the dates line up, we will say so; if they do not, we will not pretend that any Tuesday delivers the same hour.
Two days earlier, in Huế, you will have stood in a tomb courtyard where the light comes through frangipani onto stone mandarins and does something entirely unlike this. The Nguyễn emperors built for permanence. Hội An, three hours south, built something designed to fold flat, burn for four minutes, and be fished out of the river by someone with a net.
