I've watched When I Fly Towards You, Twelve Letters, and Reborn. These take time to create love, unlike this one.…
It’s based on the donghua Soul Land, which has around 265 episodes. This drama adaptation begins roughly around episode 100 of the donghua, so a lot of the early story has already happened. By that point, Tang San and Xiao Wu’s relationship is already established — they’ve been a couple long before the adaptation starts, and the drama assumes viewers are familiar with their bond.
https://kisskh.at/discussions/754413-hou-hui-you-qi/144794-director-s-notes?pid=3393058&page=2#p3393058