Next, Master Xuan Du expressed his caring and considerate condolences to the three people from Tiangong Workshop, and recalled his deep friendship with Elder Shi Ding in the past.

Shi Liuli's reply was brief and appropriate, so that Luo Yan beside her could not find any fault with it. He just felt that Miss Shi was no longer the naive and childish young lady of the past - she seemed to have turned into a mature and intellectual sister.

Elder Miao Ling was laughing awkwardly at the side, wanting to say something but unable to get a word in, and Sect Leader Xuan Du had completely ignored what they had agreed on before, as if nothing had ever happened.

After saying goodbye to the head of Xuan Du, Luo Yan left with Shi Liuli and Liang Ruhua.

As soon as he left the headmaster's residence, Elder Miao Ling caught up with him from behind and said some polite words to Luo Yan.

"...In short, if Tiangong Workshop needs coatings for mirror-type magic weapons, just come to our Yuguang Pavilion." Elder Miaoling said with a sad expression, "When Elder Shiding was still alive, I had a deep friendship with him..."

From what he said, it seems as if there is no such thing as digging traffic.

Luo Yan could only say “yes, yes, yes”. As for Shi Liuli, who was in the Foundation Establishment Stage, he was completely ignored by Elder Miao Ling and just watched the scenery calmly from the side.

After returning to Tiangong Workshop, everyone went their separate ways.

Luo Yan came to Shi Liuli's sword-making room - this was originally Linghu Chu's workshop, but now it belonged to her - and saw Shi Liuli sitting at the table, studying a sword-making atlas with a focused expression.

"Liuli." Luo Yan sat down next to her, hugged her shoulders intimately, and asked tentatively, "How did you think of using the sect protection formation to reverse the situation? Did you expect that Yuguang Pavilion would make trouble?"

"No." Shi Liuli said calmly, "It's just that after my father left, there will definitely be competitors. It's just a matter of time."

"As for whether it is Yuguang Pavilion or other weapon-making schools, it is actually not important..." At this point, she suddenly tilted her head and said, "Husband."

"What's wrong?" Luo Yan asked.

"You need to take over and master the Taiyi Dunjia Yin-Yang formation as soon as possible." Shi Liuli said seriously, "After Lei Caiyan betrayed his master, he was able to break the sect protection formation because he understood the switch mechanism of the core formation of the formation."

"Therefore, you need to modify the core array. This process is very labor-intensive and is expected to take at least seven or eight hundred years. If it is not modified, there will be a serious risk of being invaded or even controlled by the evil spirits at any time... Husband, do you understand?"

Luo Yan was stunned.

Wow, Shi Liuli, you are... so mean, really so mean! Who taught my Liuli to be so mean!

He couldn't help but wail in his heart:

"A Jing, you led her astray, right? You must have used illusion on her to make her become so despicable!"

"That's enough." Kunlun Jing said disdainfully, "Take the smell away, it's quite stinky."

Luo Yan said sadly:

"It's fine that she's not naive, let alone hardworking, but now she's already scheming. I don't even dare to imagine what she'll become in the future!"

"Wake up." Kunlun Jing said helplessly, "Shi Liuli is not stupid, right? It's just that because Elder Shi Ding took care of her before, she didn't have any responsibilities on her shoulders, so she didn't have room to use her brain."

"Now that Elder Shi Ding is gone and Tiangongfang is in a business crisis, she has finally pulled herself together. Is this something that is difficult to understand?"

"That's what I said." Luo Yan was still making a specious argument, "But if he suddenly became so alert, wouldn't the possibility of him seeing through my true identity increase?"

"No." Kunlun Jing said with a smile, "If it comes to... wisdom, I believe you can defeat her."

Hearing A Jing's perfunctory nonsense that showed he had no desire to take responsibility, Luo Yan sighed helplessly.

Alas, she is the person next to me after all, so I have to be careful in the future.

"I understand." Luo Yan stood up dejectedly, "I'll go take a look at the formation."

Shi Liuli tilted his head and looked at him, asking in confusion:

"Why are you depressed, my husband?"

"Nothing." Luo Yan said hypocritically, "I just think that Liuli, you have changed so much, I think it's because you are extremely sad, and I, as a husband, can't do anything, so I feel guilty."

"There's no need to feel guilty." Shi Liuli gently held his hand. "I'm not like this because I'm too sad. I just want to make some contributions to my husband's career because I'm your Taoist partner. Besides, Tiangongfang is also the foundation left by my father. It's not reasonable for me to sit back and watch it fall into decline."

"Okay." Luo Yan said insincerely.

After watching him leave, Shi Liuli looked at his back in silence, then slowly sat down on the chair again.

Unconsciously, the warm memories of the past with her father, her junior brother, and her senior brothers and sisters emerged in her mind. After a long time, she came back to her senses and found that she was already in tears.

"After a hundred years of confusion, seeing you back in one day is like waking up from a dream..."

"Father……"

Luo Yan left Tiangong Workshop and headed towards the central center of the sect's protective formation.

The Taiyi Dunjia Yin-Yang Array is located deep underground in the Penglai Fairy Island, and is guarded by a Nascent Soul Elder at all times.

Perhaps because the head of Xuandu had given a warning, the elder let Luo Yan pass very readily and allowed him to walk into the spacious hall of the formation room.

In the underground hall, formation runes are densely spread all over the ground, walls and ceiling. It is obvious that the technique is the work of Elder Shi Ding, and the degree of coupling between them is very low, making it very easy for a novice formation master to get started, as well as for subsequent maintenance and optimization.

No wonder Lei Caiyan found a way to open and close the formation after secretly learning for a period of time.

From the sect's perspective, such a large formation is undoubtedly excellent, and it has a relatively low reliance on the formation master... My master is too honest. Look at Shi Liuli, he is very knowledgeable.

Luo Yan smiled slightly and began to make adjustments, modifying the formation towards the direction of ancient formations.

First, improve the coupling degree of different array areas.

In this way, if the formation master has not studied this formation in depth, as long as one area is adjusted incorrectly, other areas will also malfunction or even fail.

Secondly, optimize all the suggestive rune annotations.

It is because there are too many explanations and notes that it is easy for traitors like Lei Caiyan to steal and learn it!

A formation that is too easy to be thoroughly studied will definitely have security issues. Not only do I have to delete some comments, but I also have to add more nesting, more coupling, and more loops to make the runes more sophisticated, more integrated, and more difficult to understand.

In this way, if there are traitors from the Demon Sect who try to steal the secrets of the formation, they will find that it is like reading a heavenly book, and the safety level is greatly improved!

Of course, since I set up the formation myself, there will be no problem for me to maintain it!