For those that are curious as to why they enjoy this manhua:
Aside from the visual appeal it's probably because it's ultimately a story about overcoming life's difficulties with proper communication, with tea being used as the medium to communicate. You could probably replace tea with cigarettes or candy and not change the appeal too much. The isekai aspect is probably just for framing the story so that multiple different teas could be introduced without having an entire arc about her learning about them.
IMO if this somehow ends up with her saving dying people with tea then you'll know it jumped the shark.