It's known that the live-action for the book has not been officially announced yet.
But since MDL has a page for it, we can join in discussion threads to share our views on the topic.
We all have some or other impressions of these characters. Personally, a few years back, when I first read the novel, I imagined some actors for the characters. However, the actor I would love to see in this drama, was selected as the cast of another similar show. Also, with time, I have changed my mind.
Currently, I would love to see Wang Haoxuan as Luo Binghe. The temperament and aura of the character would probably suit him. Also, as far as I have seen, he is a good actor.
I am not sure about Shen Qingqiu. Originally, I wanted to say Luo Yuxin, but he is already someone else's Shizun! Can't take him away anymore. ;)
Another one would be Zhu Yi Long. (Tbh, I liked him for the role of 'Chu Wanning', which Luo Yuxin is playing.)
So, basically, if this drama is produced, and Zhu Yi Long plays Shen Qingqui, I would say my choice of casts for both of the shows were switched. Hehe.
Now, I may be being biased here. But, since it was around the time I read the novel that their dramas released, I could relate to the characters with them a bit more than others.
I simply love all of these mentioned actors.
Let's be honest, there are so many great actors. And I have more names in my mind. But, I would love to hear all of your views first. ^_^