4. Yuchi's Ghost

The abandoned shrine stood in a fold of the foothills where the northern road began its long climb toward the Heavenly Mountains. It had been built a century ago by a pious merchant who had survived a bandit attack and wanted to thank the bodhisattva Guanyin for his deliverance. For fifty years, pilgrims had stopped there to burn incense and leave offerings of dried fruit and copper coins. Then the trade routes had shifted south, and the pilgrims had stopped coming, and the shrine had been left to the wind and the scorpions and the slow erosion of mud-brick walls.

Wang Simo arrived at noon, as instructed. He had told his father nothing. He had left a note on his desk saying he was going to the market for pigments, which was true only in the sense that he would need pigments if he survived the day.

The shrine was smaller than he remembered. He had come here once as a boy, on a trip with his master to collect mineral samples from the foothills. The old painter had spent hours scraping ochre and malachite from the rock faces, explaining to his apprentice how the earth itself was a palette, how the mountains bled color if you knew where to cut. Simo had listened with the half-attention of a child, more interested in catching lizards than in the chemistry of pigment. Now he would have given anything to return to that day, to ask his master the questions that had been forming in his mind since dawn.

Why did you paint the screaming figure? What did you see that could not be seen? And who forced you to bury it under layers of beautiful, lying ink?

The shrine's wooden door had long since rotted away. Simo stepped through the empty frame into a single square room, its walls blackened by decades of incense smoke, its altar empty except for a cracked ceramic bowl that had once held offerings. The mural behind the altar—a faded Guanyin with a thousand arms, each hand holding a different implement of mercy—was peeling in long strips, the plaster beneath crumbling to dust.

Shi Yan was waiting in the corner, standing so still that Simo almost missed him. The killer had changed his clothes. He now wore the rough-spun robe and leather apron of a common laborer, the kind of man who hauled stones at construction sites and was invisible to everyone who mattered. The knife was still at his belt, but his hands were empty, crossed over his chest.

"You came," Shi Yan said.

"You knew I would."

"I knew you were curious. Curiosity kills more men than greed." Shi Yan pushed himself off the wall and walked to the center of the room, where a shaft of sunlight fell through a hole in the roof. "Show me the second copy."

Simo's hand went instinctively to his chest, where the folded paper was hidden. "How do you know about the second copy?"

"Because I have been doing this for twenty years, and every painter I have ever met makes duplicates. It is a compulsion. You cannot look at an image without wanting to reproduce it. You made a copy of the hidden layer. Then you made a copy of the copy, with additional details you did not want me to see. I would have done the same."

Simo hesitated. Then he reached into his robe and withdrew the paper. He did not hand it to Shi Yan. He unfolded it himself and held it up to the shaft of sunlight, so that the hidden lines glowed through the paper.

"Here," he said, pointing to the corner. "The maker's mark. A cicada. It belongs to my master."

Shi Yan leaned close. His face, which had been expressionless throughout their conversation, tightened almost imperceptibly.

"Your master," he said. "The old painter from Chang'an. The one who died three years ago."

"You knew him."

"I knew of him. Everyone in the trade knew of him. He was one of the best copyists in the empire before he retired. The imperial academy offered him a position. He refused. He said he was tired of copying and wanted to teach." Shi Yan's voice was flat, but something moved behind his eyes. "He taught you."

"For ten years."

"And he never mentioned the cicada mark."

"He taught me to use it. He said it was our lineage, passed down from master to apprentice for five generations. He said a painting without a mark was an orphan. A painting with a mark had a family that would protect it."

Shi Yan laughed—a short, bitter sound that echoed off the ruined walls. "Protect it. Yes. That is one word for what the cicada does."

"What does that mean?"

Shi Yan did not answer immediately. He walked to the altar and picked up the cracked ceramic bowl, turning it over in his hands. The gesture was casual, but Simo noticed that his fingers were trembling slightly.

"The cicada mark is not a signature," Shi Yan said finally. "It is a brand. It identifies a painting as the property of a particular workshop. Not your master's workshop. Something older. Something that began in Chang'an thirty years ago and has since spread to every prefecture between here and the capital. A network of painters, dealers, officials, and killers who manufacture forgeries of famous works and sell them along the Silk Road. The cicada is their seal of quality. It guarantees that the forgery is indistinguishable from the original."

Simo felt the floor shift beneath him. "My master was part of this network?"

"Your master founded it."

The words hung in the dusty air. Outside, a wind had risen, scraping through the dry grass and rattling the dead branches of the solitary pine that stood beside the shrine. The Guanyin mural behind the altar seemed to shift in the changing light, her thousand arms trembling as though she were trying to reach for something just beyond her grasp.

"That is not possible," Simo said. "My master was a good man. He taught me to respect the old masters. He said copying was an act of devotion, a way of entering the mind of the painter you admired. He never sold his copies as originals. He always marked them as reproductions."

"While he was teaching you, yes. But before he came to Gaochang, before he retired, he was something else." Shi Yan set down the bowl and turned to face Simo. "His name was not always the one you knew. In Chang'an, he was called the Ghost Brush. He could copy any painting so perfectly that the original artist himself could not tell the difference. The imperial academy knew about him. The great collectors knew about him. They paid him fortunes to create copies that could be displayed while the originals were kept safe in vaults. But some of his clients were less scrupulous. They bought his copies and sold them as originals to wealthy merchants in the provinces, men who had never seen a real Gu Kaizhi or a real Wu Daozi and would never know the difference. Your master knew what they were doing. He did not stop them. He charged them extra for his silence."

Simo's hands were shaking now, the paper rattling in his grip. He wanted to deny it, to tell Shi Yan that he was lying, that the old painter who had taught him to grind ink and stretch silk and see the world in terms of line and wash had been exactly what he appeared to be. A tired old man. A patient teacher. A master of a dying art.

But the cicada mark was there, on the hidden layer of the scroll, drawn in his master's unmistakable hand. And the screaming figure beneath the pavilion, the figure that had been painted over and buried—his master had put it there. His master had also erased it.

"Who is the screaming man?" Simo asked.

"His name was Yuchi Danqing. He was a Khotanese painter, trained in the workshops of Samarkand before he came east. He specialized in a particular shade of red—a vermilion so vivid that it seemed to glow from within. The imperial court commissioned him to paint the pillars of the Great Buddha Hall in Chang'an. He was famous. He was celebrated. And then, fifteen years ago, he disappeared."

"Disappeared?"

"His workshop was found empty. His tools were gone. His unfinished commissions were left on his desk, the ink still wet in the grinding stone. The official explanation was that he had returned to Khotan to care for his aging parents. But his parents had been dead for ten years. Everyone knew that. No one said anything, because the official explanation came from the magistrate's office, and the magistrate's office was not to be questioned."

Shi Yan paused. The wind outside had grown stronger, moaning through the cracks in the shrine's walls. The shaft of sunlight had shifted, moving from the center of the room to the base of the altar, where it illuminated a patch of the earthen floor that had been disturbed.

"Yuchi Danqing did not return to Khotan," Shi Yan said. "He was murdered. Your master was involved. I do not know the details—I was not there, and the men who were there have mostly died since. But I know that Yuchi discovered something about the red pigment. Something that the cicada network did not want discovered. And I know that your master painted his death."

"The hidden layer," Simo whispered.

"The hidden layer. The screaming figure. The figure with the blade. The line of text. It is a record of a murder, painted by one of the murderers. Your master could not bring himself to destroy it entirely. He painted over it, buried it under a peaceful landscape, and sold it to Zhang Weiren's grandfather as a Gu Kaizhi. But he could not forget what he had done. And he made sure that the evidence would survive him."

Simo looked down at the copy in his hands. The screaming figure, the bound wrists, the glinting blade—all of it rendered in his master's precise, delicate strokes. His master had painted a murder confession and hidden it inside a forgery. And then, years later, he had taken on an apprentice and taught him everything he knew, including the cicada mark, including the techniques for detecting hidden layers, including the solvents that could lift one image to reveal another beneath.

He had wanted someone to find it. He had spent ten years training the person who would uncover his crime.

"Why are you telling me this?" Simo asked. "You are supposed to kill me. You said you have killed three men already to protect this secret."

Shi Yan was silent for a long moment. When he spoke, his voice was quieter than before, stripped of its professional detachment.

"Because I am tired," he said. "I told you that last night. But it is more than tiredness. I am sick. Here." He touched his chest. "The last man I killed, the clerk in Dunhuang, was twenty years old. He had a wife and a newborn son. I cut his throat and dumped his body in the irrigation canal and told his wife he had run away with a dancing girl from the western market. She believed me. She is still waiting for him to come back."

He turned away from Simo and faced the ruined altar, his shoulders hunched.

"I have been the cicada's enforcer for five years. I have done things that would make the Buddha weep. And I have told myself that it was necessary, that the network was too powerful to challenge, that if I refused, I would be killed and replaced by someone worse. But the truth is simpler. I was afraid. I am still afraid. And I am tired of being afraid."

Simo did not know what to say. He had come to this meeting expecting a fight, expecting to bargain for his life with the only currency he had—his skill as a copyist, his silence, his willingness to join the network rather than expose it. He had not expected a confession.

"If you want to stop being afraid," he said slowly, "help me finish what my master started. He painted the truth and buried it. Let us unbury it. Let us find out what Yuchi Danqing discovered about the red pigment. Let us expose the network and the magistrate and everyone else who has killed to keep this secret."

Shi Yan turned back to face him. His eyes were wet, though his face remained hard.

"You do not know what you are asking. The magistrate of Gaochang is only a branch. The roots go deeper. There are men in Chang'an, in the imperial academy, in the Ministry of Rites, who have built their fortunes on the cicada's forgeries. If you move against them, they will crush you like an insect. You will be the fourth man I have killed, except I will not be the one holding the knife."

"Then help me not be crushed." Simo stepped forward, holding out the copy. "You know the network. You know its members, its routes, its weaknesses. I know pigment and technique. I can analyze the red that Yuchi Danqing discovered. I can prove what it really is. Together, we can build a case that even the men in Chang'an cannot suppress."

Shi Yan stared at him for a long moment. Then, slowly, he reached out and took the copy from Simo's hand.

"There is a place," he said. "Yuchi Danqing's workshop. After he disappeared, the network sealed it and claimed it for unpaid debts. No one has entered it in fifteen years. But I know where it is. And I have a key."

"A key?"

"The magistrate keeps it in his private study, in a locked box behind his official seals. He does not know that I know about it. He does not know a great many things about me." Shi Yan folded the copy and tucked it into his own robe. "If we are going to do this, we will need evidence that cannot be dismissed. The hidden layer in your father's scroll is only one piece. Yuchi's workshop may contain more. His notes. His pigment samples. His correspondence. The tools he used to make the red."

"When do we go?"

"Tomorrow night. The magistrate will be attending a banquet at the garrison commander's residence. His study will be unguarded for three hours. I can retrieve the key and meet you at the workshop. It is in the old quarter, near the east gate, behind a sealed courtyard that everyone believes is haunted."

Simo nodded. His heart was still pounding, but his hands had steadied. The fear was still there, but it had been joined by something else—a sense of purpose that he had not felt since his master died.

"One more question," he said. "The red pigment. You said it was not cinnabar. You said it was something organic. What is it?"

Shi Yan's face went very still. Outside, the wind had died, and the silence that followed was deeper than any sound.

"Blood," he said. "Human blood, mixed with a mineral that Yuchi Danqing discovered in a mine near the Heavenly Mountains. The mineral stabilizes it, keeps it from turning brown, preserves its color for decades. Yuchi called it Crimson Lake. He thought he had invented a new pigment that would make him famous. Instead, he discovered that the mineral had to be extracted from the bodies of men who had been buried alive. The fear, the pain, the slow suffocation—it changed the chemistry of the blood. Made it bind to the mineral in a way that blood taken from the dead could not."

Simo felt the world tilt around him. "The screaming man in the painting. He was one of the victims."

"He was the first. The network needed a steady supply of the pigment. They had buyers in Chang'an who would pay any price for paintings that used Crimson Lake. They said the red had a life of its own, a warmth that no mineral pigment could match. They did not ask where it came from. They did not want to know."

Shi Yan walked to the door of the shrine and stood looking out at the foothills, his silhouette sharp against the pale afternoon sky.

"Your master painted the first murder because he could not stop himself. He was an artist before he was a criminal. He had to record what he had seen, even if he could never show it to anyone. And then he spent the rest of his life trying to bury it. But the paint does not hold forever. Underneath, the truth still breathes."

The words echoed Simo's own memory, the words his master had spoken on his deathbed. I have done things that cannot be forgiven, and I have painted them over, but the paint does not hold forever. Underneath, the truth still breathes.

He had thought his master was speaking in metaphors. He had been wrong. His master had been speaking literally. The truth was breathing beneath the paint. And tomorrow night, if they survived, they would finally let it out.

As Simo walked back down the foothill path toward Gaochang, the temple drums began to sound in the city below, calling the faithful to afternoon prayers. The sound rolled across the plain like thunder, and for a moment, Simo imagined he could hear, beneath the drums, a fainter sound. A scream, stretched thin by distance and time, rising from the sealed workshop in the old quarter where a dead painter's secrets were still waiting.