Returning to her room, Yun Ruo quickly prepared the charcoal, salt, and sulfur she bought. She then added the various metal powders to make colorful fireworks.

This empty-handed history of the dynasty has no fireworks, so to send this to the emperor, it must be the most unique of the most beautiful gifts.

Yun Ruo Lu placed the firework she prepared into the bamboo tube, waiting for it to be tested in the evening. This was the first time she had done such a thing, and she wasn't completely confident that it would succeed.

Therefore, there were more than a dozen tubes for testing purposes.

Before dusk, Yun Ruo Lu had her horse prepared for her. She planned to go outside the city to test it out in the countryside. Otherwise, once the firework was placed in the sky, everyone in the imperial city would be able to see it.

Just as Yun Ruo and her things were a few steps away from the door, she bumped into Yuchi Xuan who was about to leave.

She had originally thought that Yuchi Xuan wouldn't want to see her, so she hadn't called out to him, wanting to avoid going out of the manor.

"Yunyou, where are you going?"

Yuchi Xuan's voice rang out from behind her. Yun Ruo Lu immediately stopped and turned around, surprised. She said, "Go outside the city."

Seeing that Yun Ruo Lu wasn't wearing her imperial bodyguard uniform and had a bag on her back, someone might have even thought that she was about to run away from home.

Running away from home? Yuchi Xuan frowned slightly. Why would he think of such a thing?

He had purposely ignored her during this period of time because he didn't want her to know too many things. However, this didn't mean that she could leave.

Therefore, with an uneasy feeling, Yuchi Xuan decided not to go to the banquet. Instead, he went outside the city with Yun Ruo Lu to see what she was doing out of the city so late in the night, in case she ran away.

"It's already late, why are you leaving the city?" You won't be back until tomorrow? "

Yun Ruo nodded her head. If she were to return after testing out the fireworks, the city gates would have already been closed. Thus, she decided to stay outside the city for the night.

"I have very important matters to attend to, so I cannot return to the estate tonight."

Hearing Yun Ruo's words, Yuchi Xuan's doubts grew even stronger. He blurted out, "Then I'll go with you!"

"Mm …?"

Yun Ruo Lu could not believe it. She raised her head to look at Yuchi Xuan. Seeing that there was no hint of amusement in his eyes, she hesitated for a moment.

Just as Yun Ruo Lu was hesitating, Yuchi Xuan was worried that she wouldn't agree. He interrogated her, "You couldn't be hiding something from me, right?"

Yuchi Xuanxuan's eyes darkened. Not only did he provoke Yun Ruo Lu, he even used a different tone to speak of matters of the past.

Without further consideration, Yun Ruo Lu agreed, "How dare your subordinate, I am only afraid of delaying Your Highness' important matters. Since Your Highness is going with your subordinate first, there's naturally no problem. "

Thus, the two of them each rode a horse and headed out of the city without any guards.

On the way, Yuchi Xuan didn't say anything more. After riding for roughly an hour, the two arrived at a river in a suburban forest outside the city.

The river was clear and serene here, and the river was very wide. There were many rocks on both sides and it was quite a distance from the forest, so it was very safe to test it out here.

Arriving at their destination, Yuchi Xuan looked at his surroundings, then asked, puzzled, "What are you doing here?"

It was very quiet here, and there were very few people here. Yuchi Xuan couldn't figure out who would have the free time to come to a place like this, unless …

Suddenly, Yuchi Xuan thought of an evil idea. He couldn't be … To date a lover?

But then she thought it was impossible, because if that was the case, she had no reason to take him with her.

Seeing the complicated, ever-changing look on Yuchi Xuan's face, Yun Ruo couldn't help but laugh. She wanted to tease Yuchi Xuan, but mysteriously said, "You'll know soon enough."

"What are you doing?"

While thinking about the questions, Yuchi Xuan looked at Yun Ruo who was by the side of the river decorating the bamboo tubes and asked curiously.

He went up to get it, but was stopped by Yun Ruo Lu: "This is very dangerous, we can't move recklessly. You should step back first."

After Yun Ruo said this, Yuchi Xuan actually retreated a few steps. When he retreated to a distance three meters away from Yun Ruo, he suddenly realized that other than the emperor, Yun Ruo Lu was the first person to command him.

He saw Yun Ruo Lu take a fire piston to light the bamboo tubes. The first one didn't respond, the second one emitted a wisp of green smoke, the third one started to spark, and the fourth one made two "Zi" sounds, but no response.

Just as Yuchi Xuan was about to impatiently rush forward, he suddenly heard a loud bang, followed by a strange "Zi" sound. He flew into the air, then landed vertically on the ground.

Yun Ruo Lu looked at the bamboo tube that was already half tested with frustration. She thought to herself that there were only two days left. If she still wasn't able to succeed, she would have to disappoint Xiangqing. But she didn't want to do that. She didn't want to disappoint Xiang Qing.

Yuchi Xuan was starting to get interested in Yun Ruo Lu's odd behavior. He stood quietly not too far away, watching the bamboo tubes being ignited one after another. He didn't know what kind of surprise would come next.

Just as there were only three left, Yun Ruo Lu suddenly turned around and called out to Yuchi Xuan, "Prince, come over here for a bit."

Yuchi Xuan felt helpless. He had come to arrange things for him again, but he still walked over obediently.

Yun Ruo gave a fire piston to Yuchi Xuan and tied the remaining three tubes together. She said to Yuchi Xuan, "Do you see the ropes on the tubes? We'll light it up together later. "

As the three tubes were tied together, Yun Ruo Lu could only light up two of the three ropes at the same time. Therefore, the third string needed Yuchi Xuan to light it up.

Yuchi Xuan nodded in understanding. Before he could ask what they were doing, Yun Ruo Lu began to shout.

The length of the three ropes were the same, and since they all had the same amount of time, they were able to light up the three tubes at the same time.

A sudden sound of an explosion rang out in the sky. Yuchi Xuan raised his head and saw colorful fireworks exploding. The bright night sky was as beautiful and dazzling as the starry sky.

"That's great! We finally succeeded! "

Yun Ruo Lu clapped happily. She smiled brilliantly beside Yuchi Xuan. She was so happy that she was about to jump into the sky.

Yuchi Xuan stared meaningfully at the colorful fireworks in the sky. This was the first time in his life that he had seen such a beautiful object.

Turning her head to look at Yun Ruo Lu, she saw that her face was even more beautiful under the illumination of the fireworks. Even though she was dressed in men's attire, her face still possessed an eye-catching charm.

The fireworks are beautiful, but fleeting.

Yun Ruo was busy memorizing the successful method, and didn't notice anything unusual about Yuchi Xuan at all.

"Is this what you came here to do? But how did you come up with such a strange thing? "

After seeing the fireworks, Yuchi Xuan's mood was elated. It was as if his worries from the past few days had disappeared along with them.

"I happened to see it in an ancient book. Isn't it the Emperor's birthday in two days? "That's why I want to make this gift to your majesty for your birthday."

Yuchi Xuan was very clear on the relationship between Yun Ruo Lu and Xiangqing, so he didn't suspect anything else.

"It's getting late, let's find a place to rest."

By now the sky had completely darkened. In addition to the terrifying silence and the cool breeze by the river, Yun Ruo nodded her head and the two of them mounted their horses, preparing to ride back.

As soon as they entered the forest, Yun Ruo felt like someone was following her. She glanced at Yuchi Xuan and saw that he was nodding at her as well, indicating for her to be careful.

Just as the two of them were about to speed up, a dozen of men in black suddenly appeared around them.

Those black-clothed men all held long swords in their hands and charged towards them as soon as they appeared.

Yuchi Xuan rode on his horse to deal with the attack, while Yun Ruo Lu just stared at the group of assassins as they fought in the air with her throwing knives.

Because they had rushed out in such a hurry, both Yuchi Xuan and Yunruo didn't have any weapons with them, so they could only deal with it with their bare hands.

All of them were experts, and each of them had to fight against ten enemies at once. Soon, their disadvantages were revealed.

Yuchi Xuan was forced to retreat by the assassins, while Yun Ruo and You Long were surrounded.

If it was in the modern world, she would have killed one with her gun every second. She did not need to go through so much trouble now.

Thinking of the gun, Yun Ruo Ran suddenly remembered that she still had a few unsuccessful fireworks in her backpack.

An idea suddenly occurred to him. He took out the remaining two tubes, ignited them with fire, and threw them towards the killers.

With an explosion, those assassins were almost knocked out. They didn't have the strength to fight back.

Seeing the results, Yun Ruo Lu lit a bamboo tube and yelled at Yuchi Xuan, "Be careful, prince. Get out of the way!"

With that, he tossed the tube in his hands in the direction of Yuchi Xuan, and with another explosion, a thick cloud of smoke billowed out.

The two of them took advantage of the chaos to ride their horses out of the bamboo forest. They did not rest at the tavern outside the city, but went straight back to the city.

Even if the city gates were to be closed, they would still be able to enter and leave.

The two of them spent a great deal of effort to safely return to the manor. Yun Ruo Lu did not know where this group of assassins came from, but she could tell that they were not sent by the leader.

After returning to the palace, Yuchi Xuan instructed Yun Ruo Lu to go back and rest, then hurriedly returned to his study.

After that intense battle, Yun Ruo Lu wasn't sleepy at all. She quietly followed behind Yuchi Xuan to the outside of the study.

Seeing the look on Yuchi Xuan's face, she thought that he probably knew the origins of these assassins, so she was curious as to what he had been hiding for the past few days.

Yun Ruo Lu peeked outside the study. She saw Yuchi Xuan move something on a bookshelf. A wall of the study automatically opened, revealing a pitch black tunnel.

So there was actually a secret room here. YunRuo Lu stared in astonishment at the scene in front of her. She had entered Yuchi Xuan's study many times, but had never discovered this secret.

Yuchi Xuan had lit a lamp and entered the secret passageway, but he came out soon after.