Same I love their relationship, I would put them among my top 3. But for me the best would be YouYue and LingYu (づ￣ ³￣)づ
Oh! What is the name of the manwha they are in?
It's called The Crazy Adventures of Mystical Doctor.
You can read it here https://www.mangago.zone/read-manga/the_crazy_adventures_of_mystical_doctor/
But the manhua is not updated in a while so I actually read the novel. The title is Insanely Pampered Wife: Divine Doctor Fifth Young Miss.
Yes the title is different from the manhua lol but I get why it is so. The reason is
*Spoiler*
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1k++ chapters in but they're still not married. Still virgins lol. They will be once MC's parents are reunited cuz the ML is a very respectful person and absolutely respect MC's wishes.
But I gotta warn you that their romance part is not that much. Yes anytime they appear together they throw god food everywhere, but they don't really have that much obstacles other than the missing parents. Once they officially couple, they both trust in each other too much there's no misunderstandings. ML respects that MC is a very social person and doesn't stop her from being friendly to any males, albeit still being unnecessarily jealous. He just asked that MC will not be together alone with any male, which the MC also respect cuz she knows ML will get jealous over. (Also MC have a lot, I mean A LOT of family members, from her adoptive families to her real ones, so it's funny everytime they get to meet ML lol).
Anyway the story absolutely focus on the MC getting stronger in her cultivation. There's a prophecy and destiny and stuff that binds her future but she doesn't really focus on it. She's more like "what happens it happens" so she's just focusing on the present and on her goals.
Now, for their marriage.
Also, I can't help but be happy that Asi knows Yuqi so well that when he says he has only ever loved her, she believes him because she knows that's how he is. A lot of manwha use that as a stupid trope to drag the story making the woman look stupid. Like, sister. You been with him for so long and you know nothing about him?
Asi and Yuqi are the best straight couple that I've encountered in Chinese manwhas.