
Simi_Tutu:
has an episode duration of 17 minutes and the total watch time being 6 hours and 48 minutes is listed as a short length drama
Yeah, this is a good example of the 2025-onwards shift on SLS, where the ep lengths average more in the later teens. I really got into SLS in 2023-2024, so I'm used to the 10 min format xD
Bear in mind that MDL does have its own definitions for SLS, and that is any drama with eps under 20 minutes.

Simi_Tutu:
So a series like Zhang Gong Zhu Zai Shang that has an episode duration of 2 minutes and the total watch time being 54 minutes .
Yes, ZGZZS counts, but it was a rare drama at the time. Back then, SLS weren't as popular, and verticals didn't exist, so the content type shifted now, and dramas with ep durations of 2-5 minutes are pretty much exclusively VSD that really only have 2 min eps.

Simi_Tutu:
Vertical Shorts are Microdramas
Yes. Most range from 1 1/2 hrs to 3, which I would classify as a microdrama.
No worries. It is pretty confusing, and there isn't really a standard way to categorize them. MDL tried with the SLS tag, but it's messy. They're now trying to organize it better with the new content type update, which gives vertical dramas a place of their own, but it's a slow process.

Simi_Tutu:
But honestly, I got a bit lost between vertical, short, micro, and mini dramas.
Basically...
Minidramas - Full length eps of 20+ min (usually 45-70 min). Ep count 10 or under. (MDL definition: "Miniseries is a title that tells a story in a predetermined, limited number of episodes, of usually 10 or less episodes.")
Short Length Series - Ep lengths under 20 min. Ep count varies (typically under 30 eps). (MDL definition: "Short-length series are titles that have an average runtime of less than 20 minutes per episode.")
Microdramas - Ep lengths usually 2-5 min. Ep count varies. Total runtime is usually movie-length (1-2 hrs)
Vertical Dramas - Ep lengths are always 2 min. Ep count ranges from 60 to 110 episodes. Total runtime is usually 2-3 hours.
Does that help?

Simi_Tutu:
if the weight of micro series is the same as that of vertical series,
Not sure what you mean by this?