During the remaining five days, the empress made many attempts to assassinate or frame the second prince for crimes he had never done. For the assassination attempts most of the assassins were sent to the empress because they had a connection, but it was still unknown who sent their corpses to the empress or who killed them.
As for the framing, it didn't work that well because the witness and testimonies they made were never on par with the proof they found, but they found more evidence against the empress. The second prince unknowingly helped the emperor find more clues about his mother's location and proof against the empress.
However, during those 5 days, the empress became more impatient and started abusing the first prince, making him realize that she is only close to him in order to gain the emperor's attention and is only a tool for her to use how she likes. But the first prince had other plans and is waiting for the day his mother gets accused of treason against the second prince and takes the side he always wanted to be, by his little brother Prince Xiao.
Prince Lou never cared about his father's attention, he only cared about his little brother. That's why whenever the empress orders him to do something lethal to Xiao he tries to lessen it in secret without anyone knowing. But no one knew that his actions attracted the attention of a specific system.
This leads us to where we are now, in the library three days before Prince Xiao's food poisoning. We can see the empress heading towards Yiang's office in the library's hallway. Still, unknown to anyone except the emperor Yiang's office is connected to Loumei's office by a hidden door that also has a hidden passage that connects to a secret lab for both of them when they want to experiment with things.
These hidden doors and passages were installed after they proved their loyalty to Prince Xiao and respect towards the emperor. Only Xiao's teachers, the emperor, the shadow guards and the system knows of the existence of these hidden doors and passages and maybe Prince xiao in the future. The system 08998 knows because while observing them he saw them opening the hidden door from Loumei's office.
Now back to where we left off, the empress knocks on Yiang's office door knowing that he is busy writing his alchemic theories and will not listen to her if she opens the door as she does with the emperor.
"Sir Yiang, I wish to speak with you it is important that we speak in your office. Immediately if possible." Empress Guohei said while knocking at his door. Not knowing that there were more people there.
In the office
"Go to the hidden door and listen to our conversation, activate the hidden magic recording device before you go there. After that inform the emperor about today when you are reporting to him" Yiang orders the Hidden guards that were with him to talk about a few changes in the plans. They do as told and activate the hidden magic recording tool in his office before going to the hidden door and listening to his conversation with the empress.
Then he looks at the door "Come in, Empress Guohei. I was just finishing a few things," Yiang said while hiding the reports from the hidden guards as she enters through his office door. "So, what is it that you wanted to talk about empress?" he continues as she sits on one of the sofas he has in his office in case of 'unexpected' guests arrive at his office.
"I want you to make me a deadly poison. I don't care what type but they have to mix well with food that no one will notice," Empress Guohei said with confidence, this gave Yiang the hint that the empress is preparing to use food poisoning towards the second prince.
"I will have it ready in two days, I need to test them before giving you the final product empress," He said hiding the fact that they know who is it for, and that everything got recorded and is going to be shown on the day of her judgement.