They were clearly members of the Martial World's Evil Path, the "White Clothes Sect".
"Zhengyang? That old Confucian?" sneered a leading White-clothed Mage, "Let's not mention that we don't follow the commands of Mu Prince Manor. Even if we take ten thousand steps back, you old man still naively think that Zhengyang remains a guest of the Royal Mansion? Ha, this New Study is something even I, the Immortal Master, don't quite understand, but Zhengyang was once a Tributor under the Prince and willingly became a disciple of Zhao Douan. Ever since he returned to Yunfu last year, he started promoting the New Study... If not for his slight fame, he would've been buried alive by the Royal Mansion long ago. Laughable, you old man, so naive and adorable, yet still unaware, thinking that by relying on Zhengyang Sect, you could forge connections with the Mu Prince Manor? Little do you know, the closer you get to that Old Dog Zhengyang, the sooner you meet your demise."