This Mystery Box Is Ridiculous! It Can Even Give You a Princess's Bellyband?

[Li Qingyu has been very nervous lately] On his first day after transmigrating into a commandery princess’s page, he gets bound to a bizarre blind-box System. Opening a box every day feels like asking for trouble: Grand Academician Wang’s secret autobiography? Better keep it! It could cost the old Minister of Rites his life! The rusted broken blade of Martial God Kang? I’ll hold on to it! The martial world is already on its way to hunt me down! Worst of all is that red bellyband, which Ning Shu Commandery Princess is playing with right now! “These stitches... they do look a lot like the one this princess lost.” Ye Youxue’s knowing smile sends a chill down Li Qingyu’s back. Even worse, the Fourth Young Master of Prince Qi’s household is making trouble for him at every turn because he ruined his plans, while martial arts experts from all over the realm are watching him from the shadows... It’s not until the northern desert cavalry breach the border that everyone realizes the truth: That once-unremarkable page has somehow ended up with the tokens of the nine great sects at his waist, secret letters from the Six Ministries tucked in his clothes, and even... The Son of Heaven’s sword from the imperial desk is exactly like the one at his own waist!