From the Couple of the Old Street rules, posted on the notice board by the gate: "Couples will be judged on authenticity, chemistry, and the strength of their connection to the community."

The water went down in a day and left the town to count what it had lost.

It was less than anyone had feared and more than anyone could afford. The canal had taken the bottom shelves of eleven shops, the whole stock of the paper-fan seller, a cow, and a very fine pair of bridal shoes that the Wei sisters swore they had seen floating toward the east dock like a pair of small swans. It had left a high brown line on every white wall, level as a ruler, a hand's breadth above the doorsills, and a skin of grey silt that dried to a crust in the sun and had to be shovelled out of every kitchen by hand. By the second morning the whole of Sixth Alley was out with buckets and brooms, and the air smelled of mud and bleach and frying dough, and Wenxi, up to her elbows in a bucket of soapy water, had a feeling she had not had since she was a child. It was the feeling of belonging to a thing that was bigger than her.

She was scrubbing the flagstones of the kitchen when the bell over the front door rang.

"We're closed," she called, from her knees. "Not closed. Flooded. Mostly. If you want a bun, there are some on the, "

"Ms. Su."

She sat back on her heels.

Shen Haoran stood in the doorway of the kitchen with his hands behind his back. He had on a plain grey jacket, a good deal the worse for damp, and the cuffs of his trousers had been turned up to the shin. There was mud on his shoes. It was the first time she had ever seen him with mud on anything. His hair, usually so smooth, stood up a little at the crown, and he looked as if he had been walking since dawn. He had a clipboard under his arm and a paper bag in one hand, and he regarded the flooded kitchen with the sober interest of a man looking at a very large and very expensive patient.

"Forgive me," he said. "The shop door was open. I rang."

"It's all right." She wiped her hands on her apron. "Mr. Shen, we're not, I'm afraid we're not at our best."

"Nobody is. I have been to forty-one houses since six this morning." He held up the clipboard, with its long neat columns. "My company has set up an emergency fund for the old town. Cleaning, repairs, anything that cannot wait. No conditions. I wanted to put it on paper before anyone had to ask."

She stared at him. "No conditions?"

"None." He looked, for a moment, very slightly embarrassed. "I know how that sounds, coming from me. But a flood is a flood. It would be a poor sort of business that wanted a signature before it handed anyone a mop."

He put the paper bag on the table. It held a dozen pale rolls from the tea house, still warm. He did not say whom they were from, and did not need to.

"Thank you," said Wenxi, and meant it, and was a little frightened by how much.

* * *

He made the second offer in the front room, over tea, while Grandma Su sat in her rattan chair by the stove with her hands folded in her lap and the air of a woman attending a play.

It was not an unpleasant scene. It was not even a tense one. Wenxi sat in the low chair opposite him with her hair tied up in a cloth and her sleeves still wet. Shen sat on the edge of the stool, with his glass of Longjing untouched at his elbow, and laid the whole thing before them, quite plainly, as a man lays out the parts of a clock.

"Two point four million," he said. "For the building and the name. Not a yuan less than that, and I should say at once that the figure is not the interesting part."

"Isn't it?" said Wenxi.

"It's the other half." He turned the glass a quarter-turn. "After the flood, I went through the survey reports. Do you know how many of the old houses in Sixth Alley have damp in the foundations? Nineteen out of twenty-two. How many have timber older than eighty years that hasn't been treated? Eleven. The canal will do this again. Not next year, perhaps. Not in ten. But it will. And no single family on this street can afford to do what is needed." He lifted his eyes. "We can. We would restore the whole street, from the east dock to the bridge, house by house. New foundations. New drainage. Every beam, every tile. Done right, by the best craftsmen, to last two hundred years."

Grandma Su did not move. A small muscle in her cheek had gone still.

"And the houses?" said Wenxi.

"The houses would stay. The families would stay, on lease, at a fixed rent, for as long as they liked. They would run their shops as before. We would simply, " He paused, and she saw him choose the word. "We would hold the title. It is the only way to make the money work."

"You would own the street."

"We would look after it."

"Mr. Shen," said Wenxi.

She was surprised, afterwards, at how steady it came out. She had braced herself for the old sinking, the cold small voice at the back of her mind that said say yes, you have nothing else to offer. It was not there. She sat in her low chair with her hands in her lap and listened to the silence where it had been, and found that it had been replaced by something else. It was not defiance. It was only a plain, level, unshaken sense of where she was standing.

"It's a very generous offer," she said. "It's far better than the first. It would fix everything we are afraid of, and I think you mean every word. And no."

Shen did not flinch. He sat with his hands folded and looked at her.

"May I ask why?"

"Because the street isn't a building," said Wenxi. "It's the people in it, and what they're allowed to get wrong. You could rebuild every beam and it would still be a street where someone else holds the title." She drew breath. "My grandmother could not make one mistake in her own shop without wondering whether it was a breach of lease. And she has made a great many mistakes. She's been selling a bun at the price of ten years ago, and it has nearly ruined her, and every one of those buns was a choice. I want her to be allowed to keep making them."

A very faint sound came from the rattan chair. It might have been a cough.

"I see," said Shen, quietly.

"I'm sorry."

"Don't be." He looked down at his glass. "I rather expected it. I told myself I did not. But I stood on your step this morning and I thought, she will say no, and I thought it so clearly that I nearly brought a smaller figure." A dry flicker crossed his mouth. "I am very bad at this. Everyone says so."

He rose. He thanked Grandma for the tea, with a small bow that she returned with the grave composure of an empress. He went to the door. And there he stopped, with his hand on the frame, and did not go out.

He was looking at the lintel.

It was an old crooked beam of dark wood, black with a century of smoke, and across the middle ran the high brown watermark of the flood. Above the line, cut into the grain in faint rubbed characters, a family name could just be made out. It was Su. It had been cut by Grandfather, the year they opened the shop. A child's height lay beneath it, a row of tiny notches, and then another, and another, climbing the doorpost in a long irregular ladder.

"May I stand here a moment?" said Shen.

"Of course."

He stood on the threshold, in the mud and the grey light, and put out his hand, and laid it flat against the doorpost, against the lowest of the notches.

* * *

He had not told anyone in twenty-three years.

Shen Haoran stood on the step of a tiny bakery in a town that was not his own, with the smell of flood and warm bread in his nostrils and a stranger's height marks under his palm, and felt the old thing rise in him like water in a cellar. He had been very careful. He had built a great deal over it. He had a company and a clever face and a talent for being agreeable, and a way of looking at an old street as if he were doing it a kindness. He had worn the whole structure for so long that he had almost forgotten he had put it on.

It had begun with a pair of footsteps.

He had heard them first in the dark of a winter morning in a town called Linpu, on a river like this one, at five o'clock, through the floor of a small bedroom over a shop. They had come up the back stairs. They were heavy and slow, a man's step, with a drag on the left, and a particular hesitation on the seventh stair where the board creaked, so that every morning of his childhood he had lain awake in the dark and heard the same sequence, step, step, drag, pause, and known that his father was coming up from the ovens with the first tray.

They had never come up quicker. They had never come up slower. They had come, five mornings in six, for twelve years.

His father had been a baker. It was a plain fact and the whole of the family's wealth. The shop was called Shen and Son, though there had never been a son working in it, only a boy who sat on a flour sack in the corner doing his sums. It had a glass case and a bell and a long worn counter with a dip in the middle where seventy years of elbows had polished the wood. There had been a stain on the ceiling shaped like a bird. There had been a smell of yeast and burned sugar that got into your clothes and into your hair and into the bones of your life.

And then, in the spring of his twelfth year, a man in a good coat had come in with a briefcase.

He had not been unkind. He had been charming. He had admired the counter. He had spoken about heritage, and a vision for the waterfront, and a fair price. He had said, we will keep the name. He had said, you will not be forgotten. His father, who had been drowning in the cost of flour for three winters, and who did not know how to say no to a man who spoke so well, had put his name on a paper in the back room, with his hands shaking, and the next autumn the ovens had been pulled out.

The shop had stayed. The name had stayed. It had become a gift shop, selling paper fans and little clay boats, and the counter had been kept behind glass, with a card. Heritage Feature, the card said, in two languages. A man had sat his father down in a corner with a cup of tea and asked him to demonstrate, twice a day, in an apron. He had done it for one winter.

The footsteps on the stair had stopped.

That was all. That was the whole of it. It had not been a tragedy. Nobody had died or gone hungry. His father had found other work, and been polite about it, and been, for the next eleven years, a man who walked slowly. The boy had gone to a good school, and been bright, and been told that he had been very fortunate. But he remembered, to the end of his days, the silence in the stairwell at five o'clock in the morning. It had been the loudest sound he had ever heard.

He had made a career of it.

That was what he told himself, in the pale hours, in expensive hotel rooms. He had gone into the very trade that had undone his father, and he had decided to do it better. Not to demolish, but to save. Not to sell, but to hold. He would go to the old towns that were slipping away and put up a hand and say, wait, there is a way. He would keep the counters. He would keep the names.

And he had held the titles. And he had kept the name on a hundred doors. And more than once, in the course of fourteen years, in a restored teahouse or a polished weavers' hall with a card behind glass, he had seen an old man in an apron sit down in the corner twice a day and say what he did, and he had felt the floor go out beneath him.

"Mr. Shen?" said Wenxi.

He took his hand away from the doorpost. It had left a small clean print on the grime.

"I beg your pardon," said Shen. He turned. His face was composed, but it was the composure of a man holding a very full cup. "I was thinking about a staircase."

"A staircase?"

"My father's. It's of no importance." He looked at her, and at the old woman in the rattan chair, who was watching him over her folded hands with a quiet and level attention. And something in him, which had been held shut for twenty-three years, came open of its own accord. "No. That's untrue. It is the only thing that is."

* * *

He told it quite simply.

Wenxi stood in the narrow doorway of the shop with a wet cloth in her hand and heard it. She heard the town of Linpu and the river and the glass case. She heard a boy on a flour sack. She heard a man in a good coat, and a name on a paper, and an old man in an apron in a corner. She did not say a word. Behind her, from the rattan chair, there came no sound at all, but she felt it as one feels the presence of a lamp.

"I should say," said Shen, when it was done, "that I do not tell you this to move you. I would not have you think it was a lever."

"I don't."

"I tell you because you asked me, in your way, what it was that I wanted. And I did not know how to answer." He spread his hands. "I want the shops to stay. I have wanted it since I was twelve. That is the whole of my ambition. It is a very simple one. And I have been going about it for fourteen years in precisely the manner that undid my father, with a briefcase and a fair price and a card behind glass, and I did not see it. Until the day a girl in a cream dress told a roomful of strangers that her grandmother's moulds could not be washed because wood remembers."

He smiled, and it was neither polished nor professional. It was lopsided, and tired, and rather young.

"I went home that night and sat in a hotel room and thought, he is right. It is the wood. We have been keeping the wood and throwing out the hands."

Wenxi found that she had sat down on the arm of the nearest chair. She did not remember doing it.

"Why did you look at us like that?" she said. "At the interview. At the festival." She felt her face grow warm, and let it. "I saw you. When we said the thing about the step. And on the quay. You looked as if, "

"As if I'd seen a ghost?"

"As if you'd heard one."

He was silent for a moment. A drop fell from the lintel into the mud.

"Because you listen to one another," said Shen. "That is all. It is the rarest thing I know. My father never had it with anyone, and I have never seen it in a couple in the whole of my work. People talk, and they are looked after, and they stand at a distance with a great many opinions. But you two know the sound of each other's step." He shook his head. "I heard it, and I thought, that is the staircase. That is what it would have been, if it had gone on."

Grandma Su rose from her chair.

She did it slowly, with one hand on the arm, and crossed the little room in her felt slippers. She came to the door and stopped in front of the tall young man in the muddied grey suit. She looked up at him, a long way, from under her white hair, and her mild old eyes held his, and there was no pity in them, nor any anger, nothing but a deep and level courtesy.

"What was your father's name?" she said.

"Shen Weiguo."

"A baker?"

"Yes."

"Was he any good?"

"He made a sesame brittle," said Shen, in a voice that was not quite steady, "that people came from three villages for."

"Then he was a good baker," said Grandma Su, and reached up, and patted his cheek, twice, with her small brown hand. "Sit down, boy. You have been standing in a doorway for twenty-three years. There's more tea."

He did not sit. He stood quite still with his eyes closed and her hand against his face, and Wenxi, looking at the dark line of his lashes, saw them wet.

He left a quarter of an hour later. He took with him, in his clipboard, the emergency fund, which was to stay without conditions, and nothing else. He did not mention the offer again. At the door he turned and bowed, to them both, very deeply, and when he straightened up there was in his face for the first time a look that she could put a name to. It was not triumph, or calculation, or the clever pleasant mask. It was the look of a man who has walked a long way round and found, to his surprise, that he is on a road.

"I should like to do it differently," said Shen. "I do not yet know how."

"Neither do we," said Wenxi.

"Then perhaps," he said, and the lopsided smile came back, "we shall find out together."

He went away down the wet alley with the clipboard under his arm, picking his way between the puddles in his ruined shoes. They stood in the door and watched him go. At the third flowerpot he paused, and bent, and lifted something out of the mud, and straightened with a small clay boat in his hand, one of the paper-fan seller's, glazed blue and quite unbroken. He looked at it. He wiped it carefully on his sleeve. Then he set it on the step of the Gu Family Workshop, where its owner would find it, and walked on.

"He isn't the enemy," said Wenxi, to nobody.

"No, my dear," said Grandma Su. "I never thought he was."

She was looking down the alley, at the narrow grey back going away between the white walls. She was smiling, but it was a small and rather sad smile, and the hand that had patted his cheek was still held a little way in front of her, palm out, as if she could still feel the warmth of it. Then she turned back into the shop, and went to the stove, and began, for the first time in a week, very quietly, to hum.

It was not the wedding song. It was another tune entirely. It was slower, and older, and Wenxi had never heard it before in her life. She stood in the doorway with the wet cloth in her hand and the sun coming out over the drowned roofs, and listened, and understood that she was hearing something that had been waiting a very long time for someone to ask.