They had to cross Black Scabbard Mountain, one of the most precipitous spots on the Liangzhou road. The air became colder and colder as the road grew steeper, and despite the fact that it was only September, snow flakes floated down around them. The road deteriorated to the point where there was a steep mountain face on one side and a sheer cliff on the other falling into a deep ravine. The soldiers moved slowly hand-in-hand, terrified of slipping on the snow. Several of the bodyguards dismounted and helped to support Wen's carriage.

Just as they were gingerly making their way forward, they heard a chirping sound coming from in front. A moment later, the sound turned into an unearthly howl, tragic and harsh, which echoed through the ravine causing everyone's hair to stand on end. The soldiers all stopped in their tracks.

Then came a shout: "Those who continue will meet the King of Hell – Those who turn back will survive."

How could the soldiers dare to continue?

A man appeared around a curve in the road ahead. "Those who continue will meet the King of Hell, those who turn back will survive," he intoned in a deep voice.

The soldiers recognised him as the demon that had appeared twice the day before and had killed with just a wave of his hand, and they turned and fled with squeals of fear. Cao Neng shouted to them to halt, but he had to raise his sword and slay one of the soldiers before some of them steadied. But sixty or seventy had disappeared.

"Guard the carriage," Zhang said to Rui. "I'll go and talk to these two." He leapt passed the soldiers. "Could that be the Twin Knights up ahead?" he asked in a loud, clear voice. "I, Zhang Zhaozhong, greet you. There is no enmity between us. Why are you playing this game?"

The man in front laughed coldly. "Ha! So, the Twin Demons meet the Fire Hand Judge," he said. He strode over and struck out at Zhang with such power that his hand made a whistling sound as it cut through the air.

The road at that point was extremely narrow and Zhang was unable to dodge to either left or right, so he countered the blow with his left hand, putting all of his Inner Strength behind it, while also attacking with his right palm. His opponent parried with his left hand. Their four hands met, and they stood almost motionless for a while as they tested each other. Suddenly, Zhang swept his left leg cross-wise in the 'Level Clouds Slicing The Peak' style. With insufficient time to evade the blow, the man brought his hands together and drove them viciously at Zhang's temples. Zhang leant to one side and hastily withdrew his leg, then moved forward, and with the precipice at their side, the two passed each other by. They had exchanged positions.

Zhang suddenly became aware of someone attacking him from behind. He dodged out of the way and saw his assailant was another pale, skeleton-like figure, his face exactly the same as the first.

Zhang had more than two hundred soldiers and bodyguards with him, but they were powerless to assist because of the narrowness of the mountain path beside the ravine.

The three fought more and more fiercely. In the midst of the battle, one of the Twin Knights hit the rock-face by mistake and a small avalanche of gravel rattled down off the precipice followed by a slab of rock which plunged into the ravine. A long time passed before they finally heard the distant crash as it hit the ground.

The battle continued for a long time. Suddenly, one of the twins struck out with his fist, forcing Zhang to move to one side to avoid it. The other twin then leapt over and occupied Zhang's former position beside the stone-face and both attacked him at the same moment, attempting to force him into the ravine.

Zhang saw one of his attacker's legs sweeping forward and stepped back a pace, so that half of his foot was over the edge of the precipice. A cry of fright went up from the troops. Then, Zhang felt a gust of wind as the other twin's fist swung towards his face. Zhang was unable to retreat, and knowing that there would be great strength behind the blow, was also unable to counter it. If he did, his opponent would simply be thrown back against the stone-face by the force of the collision while he himself would certainly fall to his death. So, with wisdom born of fear, he seized hold of his attacker's wrist, and with a great shout threw him into the ravine.

His body in mid-air, 'Black Death' stayed calm. He drew in his legs and performed a somersault in order to slow down the force of his fall. Half way through the circle, he pulled a Flying Claw grapple from his belt and threw it straight up. His brother 'White Death' had also taken out his Flying Claw and the two grapples locked tightly, almost as if they were shaking hands. 'White Death' jerked at the rope before the full force of his brother's fall returned, and swung him up and over bringing him back to earth more than a hundred feet along the mountain path.

'White Death' saluted Zhang with his fists. "Your kung fu is very powerful. We are impressed," he said. Then, without even bending down to concentrate his strength, he sprang into the air, and landed several dozen feet further away. He grabbed hold of his brother's hand and the two disappeared round the bend.

The soldiers clustered round, some praising Zhang's kung fu, others lamenting that 'Black Death' had not fallen to his death. Zhang said not a word, but leaned against the rock face and slowly sat down. He looked at his wrist and saw the jet-black impression of five fingers on his flesh as if he had been branded, and was struck by a wave of terror.

The column crossed Black Scabbard mountain, and that night another thirty or forty soldiers deserted. Zhang discussed the situation with Rui and the other bodyguards.

"These fellows are not going to give up even though this is the main road to Lanzhou, the provincial capital," he said. "There's going to be a lot more trouble ahead, so we had better make our way round by the backroads, and cross the river at Crimson Bend."

Cao Neng had been looking forward to getting to Lanzhou so that he could transfer his burden to other shoulders, and was very unhappy with Zhang's plan. But he did not dare to disagree.

"We have lost many soldiers on the road," Zhang said. "When you get back, Master Cao, you can report that they were killed during an attack on bandits, and died courageously for their country. I will write out a note to that effect in a moment."

Cao Neng's spirits rose again. According to the military regulations, if a soldier was killed in action, it was possible to obtain a pension, and the money naturally fell into the pocket of the officer in command.

They heard the roar of the Yellow River long before it came into view, and travelled more than half a day further before arriving at the Crimson Bend crossing. At this bend on the Yellow River, the rocks along the banks are blood-red, hence its name. Dusk was already approaching, but through the evening mists, they could see the fury with which the Yellow River surged eastwards, its muddy waters bubbling and boiling against the banks.

"We will cross the river tonight," Zhang said. "The water is dangerous but if we delay, there may be trouble."

With the river running so fast, the crossing could only be made by sheepskin rafts. Soldiers were sent out to search for rafts, but they could not found any. Darkness fell. Zhang was just becoming anxious when he spotted two sheepskin rafts shooting down the river towards them. The soldiers shouted, and the two rafts edged towards the bank.

"Hey, boatman!" Cao shouted. "Ferry us across and we'll pay you well."

The big man on the raft stood up and waved his hand.

"You're a mute," said Cao.

"Damn your ancestors," replied the man in Cantonese. "If you're coming then come, if you're not, then don't. You bunch of bastards. It's a waste of time dealing with you." Cao and the others understood not a word of it. Cao ignored him and invited Zhang and the bodyguards escorting Wen to get onto the rafts first.