Dragon orbs aka "dragon balls" are orbs chinese dragons hold in their mouths/necks/claws and represent a variety of random stuff, go google it if you wanna know more. The dragon balls from DBZ are inspired from these. And no, they're not draon testicles.
Thanks for the chapter
Honestly they shouldn't even promote the option of gaining nobility as a perk with gaias system while maybe normal citizens might not have all the information all the famous people and anyone with a high enough rank should know about the history of China thus realising the eventual fall of nobility.
HoarsMane