1) Male protagonists (Lan Ling Prince/PoLL and Wei Wu Xian/TU) wear a mask each.
2) Protagonists in both dramas (Yang Xue Wu/PoLL and Wei Wu Xian/TU) share the same sunny, cheerful, inventive disposition with a courageous, righteous and resolute heart to protect the weak and also loved ones. Perhaps so similar that there are actually two similar scenes: https://mydramalist.com/profile/whatever_weus/feeds/kDb5RFJ
3) Relationships (kinships, friendships) between the characters in both dramas touched me - tissues may come in handy at a number of points in the dramas
4) Similar in style and pace with a mix of laughters, tears, angsts
5) Elaborate costumes, filming locations and world building
6) Beautiful and meaningful OSTs
Note for TU: TU while adopted from a bl novel, portrayed the male leads as confidants with strong brotherhood, and only bits of queer subtle for the experienced bl enthusiasts, in respect to the original bl novel. Chinese censorship has transcended the bl novel into a critical series showcasing Chinese culture, music, sceneries, costumes, intriguing plot on the protagonistβs ordeals going against society, using unorthodox methods to fight evil and help the weak.