Ding Yu Xi dubbing?

Just asking because the wiki information is a bit confusing for me:
Ding Yu Xi as Mu Sheng / Fu Zhou (voiced by Wei Yi Fan)

So, is he dubbed by Wei Yi Fan in both roles, or only as Fu Zhou?

Just curious :D No negative comment.

I'm pretty new to Chinese dramas. Why is Ding Yuxi dubbed? Although I have time admit, his dub voice actor was really good and I enjoyed his voice. I couldn't tell he was being dubbed until I watched a review on this drama. 

@Sheriziya What do you mean by conflicting schedules? I know dubbing in C-dramas is common, but I thought it was done for actors who aren't fluent in Mandarin or they change the lines later, but in the latter case, it's still the original actor who dubs their voice in.

Do voice actors dub the entire series, though? I mean, there are times I could tell a voice was dubbed in, but the VA's voice sounds similar to Ding Yuxi's actual voice, so I couldn't tell. It did sound like Ding Yuxi's actual voice in most of the scenes. I'm just curious how dubbing works.

@Sheriziya that makes sense. Actually, after watching DYX in Romance of Tiger and Rose, I think he didn't really use a VA to dub himself in Love Game. It's his real voice. In Tiger and Rose, the dubbing is obvious and doesn't sound like him or match his mouth...it sounds like a completely different person to me and it distracts me from his acting so much. 😅 His acting has improved so much since Tiger and Rose, though. Those micro expressions of his speak volumes without words in Love Game. 🥰