I'll add some scenes that I noticed as well!

ep 1 - the constant dying and reincarnation is a bit like love game in eastern fantasy

ep 4 - underwater kiss may be a reference to Lost You Forever

ep 5 - when Song Yi Meng has Nan Heng pinned down is a throwback to A Journey to Love

ep 9 - when they are plotting to kill Nan Heng, Li Shi Liu's imagination literally has Nan Heng dying in the same manner (with same bgm) as Liu Yu Ning's character in A Journey to Love

another scene! You know when she was walking up the stairs in the snow, wearing a red dress, with sad music playing? That reminded me of One and Only <3 Because I thought she was going to jump off the tower. 

Holding the knife to her neck similar to Xie Wei holding knife to neck of Jiang Xue Ning in The Story of Kunning Palace 

The father is biased to the point of insanity in - Who Rules the World, Blossom
The arrow in the chest in - Love Like the Galaxy.
ML stabs FL - The King's Woman
After jumping off a cliff, ML+ FL survives-The Legend of Anle
Darkening sky before modern-day return- Moon Lovers: Scarlet Heart Ryeo
All of ML's companions die in the penultimate episodes- A Journey to Love
Underwater kiss- Back from the Brink
Woman slits her throat and goes back in time- Story of Kunning Palace
Man is willing to break off engagement if girl doesn't say yes voluntarily- Girl changes her mind and marries, though she fears an unfortunate outcome -- Blossom
Male dual identity- Who Rules the World

I didn't see anyone else mention this but I started watching The Romance of Tiger and Rose after I finished ADWAD and the scene where Nan Heng asks her what if her world is also a story is pretty much the same as in TROTR where Han Shuo asks her about her world and then asks her if it might also be a screenplay.