"Even if it wasn't done by that little girl, it must be related to that family on the mountain. You should be careful on the way. That family hasn't been caught yet."

Before leaving, the Lady Boss didn't forget to remind him.

Gu Liuyan remembered that Zhu Yan had once said that Su Yu Wan had once killed a child, and that it had also been poisoned.

Duan Chengxuan's expression was extremely unsightly. Gu Daiyan then softly said, "With your martial arts, it won't be difficult for you to climb up the mountain even if you're stuck in the snow."

"I won't go alone." Duan Chengxuan clenched his fists. Just talking to Gu Mingyan in a gentle voice had already consumed all of his patience. "I believe you understand poisons."

"Alright." Gu Danyan nodded and hastily finished the Herbal Tea Eggs in his hands. He then asked the Lady Boss for a bag of rations while wrapping himself up with a woolen blanket as he followed Duan Chengxuan out.

"I'll carry you." Duan Cheng Xuan bent his back towards her.

"I can walk."

"Do you want me to lose you again?" Duan Chengxuan impatiently turned his head around and directly brought the person up onto his back. Gu Daiyan felt that she wasn't losing out, so he only shook the thing on her back and wrapped her arms around Duan Chengxuan's neck without saying a word.

Even though the person on his back was fully wrapped up, he still didn't have much weight.

Duan Chengxuan was extremely familiar with this mountain path that he had walked since he was young. Besides a few slight changes, all of this still seemed like yesterday.

It was just that the person on his back had changed.

The journey that should have taken about two hours had also increased by a lot due to the amount of snow as deep as his ankles.

The walls of the small quadrangular courtyard at the top of the mountain were slumped in a patch of snow. There were only two rooms left, and under the cover of the snow, there were still some wooden racks that contained weapons.

Even Duan Chengxuan frowned. He had no choice but to place his on the stairs under the eaves, and pull up his sleeves and clean up the room as he had done when he was young before waving his hand towards Gu Mingyan, who was at the door.

Gu Danyan stood up with a stiff posture, wrapped in a thick cloak and looked around the room.

There was a bed on the left and right side of the room, but there were bookshelves on the other bed, and a table in front of them. A few chairs were obviously no longer usable, and the only thing left to sit on was the edge of the bed.

Gu Danyan sat down and hugged the blanket to her chest, "Go worship Master and Mistress, I'll rest here for a while."

"You don't want to come with me?" Duan Chengxuan was currently taking down the books that were broken down in front of the bookshelves.

"It has nothing to do with me." After covering himself with the blanket, Gu Danyan put down his cloak and simply laid on his side beside the bed, as if he was really sleepy.

The latter just silently closed the door and left.

Duan Chengxuan's back was always warm, so Gu Panyan shrunk back into the bed and lightly fell asleep.

It had been a long time since Duan Chengxuan had last seen him, but he could only place some dry rations in front of the tombstone as a form of respect. Even though it was snowing heavily, he could tell that someone had done something to the tombstone.

Opening up the snow on the ground, what entered his vision was a coffin-like metal box.

This was the iron box that Master used to hide things. Inside was the keepsake that Master and Mistress used to hide things — it should have been buried together with Master and Mistress.

He had originally thought that someone had dug up his Master's grave, but when he picked it up, he noticed that there was a rusty chain connected to the ground. Duan Chengxuan had cut it in half, and only then did he discover that there was another universe under the stone block in front of the tombstone.

Why didn't he notice it in the first place?

Putting the metal box in his pocket, he naturally knew where the key to Mistress had left it after her death. He paused for a moment before leaving.

When he returned, Gu Liuyan had already woken up. She was standing next to the bookshelf as she pulled out a pen and held it in her hand to examine it. When Duan Chengxuan returned, he only handed the pen over and said, "I originally thought this was made of wood, and upon closer inspection, I realized that the engravings on it were actually made of wood, but inside it is a piece of metal. The craftsmanship seems pretty good."

Duan Chengxuan was slightly stunned as he placed the brush in his hand and weighed it in his hand. He only knew that when he was young, he didn't like to practice calligraphy every day, so he didn't notice that the brush his Master usually used was strange.

"This time around, I have discovered quite a number of things that I had not paid attention to before." Duan Chengxuan pulled her over to the bedside and sat his down. Then, he took out the coffin box and placed it next to the brush. "Master is good at mechanism, Mistress' house is made from smelting. Their swords and sabers are also made from Mistress' house."

"If that's the case, then this writing stick and this coffin were fought by your Mistress' family."

"That is indeed the case. However, after leaving in a hurry that day, Long Tianyan grew up. Master and Mistress were no longer in this place and they have never returned." A sense of loss appeared in Duan Cheng Xuan's eyes. She recalled that Su Yu Wan always stopped him from returning, so she hastily paid respects to her in her residence ….

Gu Danyan fiddled with the two items in his hands and helplessly said, "I don't know much about these things. Let's go look around and see if there's anything strange."

"Don't leave the courtyard." Duan Cheng Xuan warned.

At this moment, Gu Danyan nodded obediently and went to check on the other rooms.

The first thing he wanted to check was the place where the Lady Boss said he was going to dig out the poison. There was a huge pit left behind, and even the nearby ground was covered in poison, making it difficult to get close to.

Gu Mingyan covered her mouth and nose with her veil and brushed away some of the soil. She took a wooden stick and prodded back and forth for a while, and sure enough, it was a rock that was stuck in the ground. It took him a while to move all the poisonous dirt to the side, and then she called for Duan Chengxuan to take a tool to open up the stone tablet.

Gu Daiyan glanced at the entrance of the cave and was pulled open by Duan Chengxuan. "There's no need to look."

"What have I never seen before?" Gu Liuyan still wanted to pull back her hand, but Duan Chengxuan's grip tightened at this moment, as if he was unwilling to let go. Gu Daiyan had no other choice but to be forced back into the house.

"What is it?" When she saw the light again, she couldn't help but ask.

"You don't need to know. I just opened the iron box. I know everything that happened." Duan Chengxuan's expression was extremely unsightly, to the point that it was shocking, and his entire face was deathly pale.

Gu Liuyan didn't continue asking.

However, after searching for a while, the sky darkened and he didn't plan to go down the mountain. Duan Chengxuan didn't have much feelings towards these houses, so he directly put the fire inside the house and boiled some hot water.

The fiery light shone upon the two of them until their faces were completely red. Duan Chengxuan fiddled with the fire and did not forget to ask, "How do you know that there's something below the poisonous miasma?"

"If the things below were dirt, those yamen runners wouldn't have been hit by it so easily." Gu Danyan held his knees and the hot water in his hands and continued, "Besides, I looked at the poison. It can't be considered strong. It's just some special poisons added together. It's possible that they'll corrode after a while."

As she finished speaking, Gu Daiyan's bright eyes looked at Duan Chengxuan. "I'm curious as well. What did Su Yuwan do?"