Han Yu's speed was one notch faster than Zhang Ruochen's, and soon he caught up with Zhang Ruochen.

  Zhang Ruochen said: "Even if we join forces, we are definitely not a match for Huo Jingcheng. When I fought against the Town Spirit County Master, I was already injured, and it's possible that my injuries are more severe than yours."

  "What's to be done"

  "Run if you can, otherwise, I'll fight him to the death."

  Zhang Ruochen and Han Xuan's speed was already extremely fast, but Huo Jingcheng's speed was even faster, chasing them closer and closer.

  "Whoosh"

  Huo Jingcheng flew in the hurricane, his arm waved, and two wind blades were cut out again.

  In their current state, it's impossible for the two of them to withstand the power of Wind Blade.

  Zhang Ruochen and Han Xuan almost simultaneously rushed out to the left side, rolling on the ground, narrowly avoiding it.

  After they escaped from the forest, a dense white fog suddenly appeared in the air. The ground was littered with rubble and broken walls, with some incomplete city walls, dilapidated streets, and some human and beastly white bones.

  "What's going on? What is this place?" Zhang Ruochen said.

  Han Xuan was overjoyed and said, "I know that this is a primary ruin called the White Fog Ancient City. It's said to be where the Half-Saint White Fog once lived. However, after a long time has passed, it has been completely abandoned. I and the disciples of the Cloud Platform Sect have come here for training before. To think that we've escaped to the White Fog Ancient City, now we're saved!"

  "For Xuanji Realm and Diji Realm warriors, primary ruins might still pose some threat. However, for Tianji Realm warriors, they are not considered a danger. Do you think a primary ruin can stop Ho Jing City?" Zhang Ruochen said.

  Han Yu said: "I remember that in the White Fog Ancient City, there is an underground palace. Perhaps it can withstand him. Zhang Ruochen, follow me."

  Huo Jing Cheng chased after the two of them, continuously striking out with his Wind Blade, splitting the dilapidated buildings in the White Fog Ancient City into four or five pieces.

  "Huo Jingcheng let out a loud roar."

  A strong gust of wind swept across a wide street, sending massive boulders flying towards Zhang Ruochen and Han Xuan.

  Zhang Ruochen unfolded the Wind Dragon Shadow, transforming into a flying dragon shadow, passing through the giant stones with ease, dodging it lightly.

  "Hmm"

  Han Yu was not as agile as Zhang Ruochen, and he was hit by two giant stones in a row. He spat out blood from his mouth and flew forward with his delicate body.

  Zhang Ruochen swooped in with a whoosh, scooping up Han Xuan and embracing her tightly as he somersaulted through the air, charging straight into the grand entrance of the underground palace.

  Huo Jingcheng closely followed behind, also wanting to rush in.

  Rumble

  The stone gate of the underground palace fell from above, blocking Huojing City outside.

  The stone gate is over 50 meters high, made of hard granite sandstone. Even for a martial artist at the Tianji boundary, it's not an easy task to blast open the stone gate.

  "Hong Hong"

  Zhang Ruochen hugged Han Xuan and rolled down from the stone steps, falling to the bottom of the palace.

  Zhang Ruochen was already covered in injuries, and with this fall, his whole body felt like it had fallen apart, lying on the ground, motionless, panting heavily.

  It was too thrilling, just a little bit more and I would have been caught up by Huo Jingcheng.

  Han Yu was held in Zhang Ruochen's arms, pressed against his body, and didn't move at all. Earlier, she had been hit by two huge boulders on her back, suffering extremely severe internal injuries, almost fainting from the pain.

  She leaned into Zhang Ruochen's arms, her hands wrapped around his neck, and whispered: "Thank you"

  At this moment, the two are almost in close contact, very intimate.

  Zhang Ruochen felt two soft mounds pressing against his body, and his nose caught a faint fragrance. He immediately woke up, and his five fingers gently touched Han Xuan's back, lightly pushing her body to the side.

  Zhang Ruochen struggled to sit up, took out a light attribute spirit crystal and infused his true energy into the crystal.

  Ling crystal, emitting bright light, illuminating the underground palace.

  The underground palace is very spacious, with a height of about 120 meters, a length of 200 meters, and a width of about 80 meters. It's a very empty space, like an underground martial arts arena.

  On the stone walls of the palace, many ancient patterns are carved, seemingly some kind of formation.

  Han Yu also sat up, his face a bit pale, staring at Zhang Ruochen and said: "Thank you for saving me just now."

  Zhang Ruochen stared at her with some curiosity and said, "Didn't you already thank me?"

  "Really?" Han Xiao's face was a bit hot, afraid that Zhang Ruochen would not let go of what happened earlier, so he added another sentence, "I completely forgot about what happened just now."

  "Can't remember, never mind. Hurry up and recover from your injuries. This underground palace has been abandoned for too long, the defensive formation has lost its effect, and a single stone gate can't hold off Ho Jing City for much longer."

  Just as Zhang Ruochen finished speaking, a loud noise came from the direction of the stone gate, causing the entire underground palace to shake slightly, and dust fell down.

  Boom

  Boom

  Huo Jing Cheng began attacking Shi Men, and with each slash of his Wind Blade, a deep mark would be left on the stone gate.

  Almost every second, the stone gate would be struck and shaken once.

  Zhang Ruochen and Han Xuan didn't dare to delay, immediately took the wound-healing medicine, sat cross-legged on the ground, and began to heal their wounds.

  An hour later, Zhang Ruochen opened his eyes, stood up, and heard the loud noise coming from outside, with a deep worry in his eyes.

  After a period of recuperation, Zhang Ruochen's injuries had mostly recovered, but to fully recover, he would need at least two more days.

  With the defensive power of the Earth Temple's stone gate, it won't last even two hours, let alone two days.

  Zhang Ruochen stared at the array patterns on the stone wall of the underground palace, pondered for a moment, and walked over.

  Han Yu also opened her eyes and saw Zhang Ruochen's actions, asking: "What are you going to do?"

  "In our current state, once the stone gate is breached, we will undoubtedly die, without even a chance to escape."

  Zhang Ruochen dragged his chin, staring at the texture on the stone wall, and gently stroked the stone wall with his fingers, saying: "If we can repair the array pattern of the earth temple, open the defensive array, then even if Huo Jingcheng's cultivation is ten times stronger, I estimate he won't be able to get in."

  Han Xuan shook his head and said, "It's useless. The formation here was personally recorded by Bai Wu Half Saint, and it's extremely profound. A formation master from the Cloud Platform Sect spent three months researching it, but still couldn't decipher the formation."

  Zhang Ruochen said, "Although I am not a master of array techniques, I have read many profound books on array techniques and have some research on them. Maybe, I can repair part of the array patterns here."

  Han Xuan gave Zhang Ruochen a glance and said, "I don't know where your confidence comes from. Even the Array Masters can't figure out this array, you think you can understand it in just one hour?"

  "You think the Array Master of your Cloud Platform Sect is at most a 4th-grade Array Master. Do you think he has even seen any 5th or 6th-grade array books?"

  "You've seen it," said Han Xiao.

  Zhang Ruochen's mouth slightly hooked up and said: "If I'm not mistaken, the formation pattern on the stone wall of the underground palace is a six-grade formation."

  Array Masters, in the Kunlun Realm, can be said to be a relatively noble profession.

  A city and a sect, if they are defended by an array of methods, can easily be breached by barbarous beasts, leading to the slaughter of the city and the extinction of the sect.

  So every city will set up a protective array, and at least three third-grade array masters are needed to set up the protective array.

  As the king's city of Wugun County, the protective array of the city wall must have a four-star array supervisor to be successfully arranged. The power that bursts out is enough to crush the heavenly extreme martial arts myth.

  In Tianmo Ridge's thirty-six states and counties, a 4th rank Array Master was already an existence standing at the peak.

  As for the six-product formation method mentioned by Zhang Ruochen just now, it is something that Han Xuan dare not even think about.

  The Six Tomes of Array Methods, let alone the Cloud Platform Sect's headquarters, even the Inner Palace Academy of the Tianmo Martial City wouldn't have it.

  Han Xuan stared at Zhang Ruochen in shock, saying: "The Array Master of the Cloud Platform Sect also said that this six-grade array has an array pattern. Could it be that you really understand array patterns?"

  "It's not mastery, just having read many books on six-product array methods." Zhang Ruochen said solemnly.

  The complexity of the Six-Product Formation Method is not something that ordinary warriors can imagine. To clearly explain a formation method, a sixth-grade formation master would at least need to write as much material as a book.

  It can be said that an array is like a book.

  If a book of six product array method is passed out, it will definitely be robbed by the array method masters. As long as they can infer some things from it, it is enough to make their attainments in array method improve a level.

  However, judging from Zhang Ruochen's words, he seemed to have read many books on sixth-grade formation methods, which made Han Xuan feel quite unbelievable.

  If Han Xuan knew that Zhang Ruochen had also read many seventh-grade array method books and eighth-grade array method books, it's unknown what she would think.

  Han Xuan asked: "How confident are you in setting up a sixth-grade formation?"

  "Deploy the Six-Product Formation"

  Zhang Ruochen shook his head and said, "With my current understanding of array techniques, it's absolutely impossible to set up a sixth-grade array. However, if we only need to repair this one sixth-grade array, there is still some possibility. Moreover, it doesn't require complete repair; even repairing just one-tenth of it would be enough to block Huo Jingcheng."

  Zhang Ruochen took out a pencil and began to repair it according to his own understanding.

  The pattern of the Six Products Formation is quite complex, mysterious and delicate, which tests the spiritual power of the formation master. Even a small mistake can cause the formation to fail.

  Liu Pin Zhen Fa Shi is an existence that even Zhang Ruochen needs to look up to.

  Their spiritual power has reached above forty levels.

  They can use spiritual power to communicate with flying birds and beasts; they can use spiritual power to transmit sound to people thousands of miles away.

  Repairing the Six Product Array Formation was no small challenge for Zhang Ruochen.

  Zhang Ruochen didn't dare to casually touch those complex seals, and could only repair some simple ones. Even so, he was extremely careful, fully focused on merging with the array seal.