Both are baihe (Chinese GL) in a historical setting with stuff like martial siblings and cultivation in general. The plot is also kind of similar and the main characters in this movie acts the same as the main character here.
Even though the leads aren't cats, it's also a heartwarming and pure drama about a bar who comfort their customers, and has 3 main characters. Cinematography-wise, it's pretty similar too, it has the exact same warm vintage & somewhat autumn based colour scheme making it a visual treat for the eyes. Overall if you're looking for a drama that's a delight from the start till the end, then I'd suggest you to give it try!
Both are GL historicals and have a gorgeous cinematography, but this short movie's story is somehow much easier to understand than Legend of Yun Qian's though. I personally liked it more.