Finally a long tele zoom lens.
And something that looks like a 28-70mm f/2 lens of their own (the red thing in the middle; the zoom range is in the ballpark and 大光圈 means "large aperture" in Chinese... so it may be something more than just making - say - their own version of Sigma's 28-70/2.8).
I suppose a 28-70mm f/2 would make sense for videos