The character for tower, 楼, has a tower in it in the logo
Here’s another set of posters for wuxia drama Tingxue Tower. The giant logo is really the focus of this set more than either Qin Junjie or Yuan Bingyan. But hey, if I had a cool logo, I would showcase it, too. The character for tower, 楼, has a tower in it and that’s pretty clever.
Didn’t notice the tower until you pointed it out. The designer should’ve made it a bit more conspicuous with a soft, graduated image of a tower imposed over that section of the calligraphy.