This took me some time to find. So it's a part of the shipyard that's on the other side of the Dalian bay completely. Seems to have started construction in late 2000s, then built commercial ships for a decade and then had a large expansion of roofed halls around 2020, after which destroyers were often observed in the docks. Possibly for maintenance or furbishing?
Quite possible that large dock will be making a carrier. Interesting times. That'd make the 3rd separate dry dock in China where carriers have been/will be made. 4th if one counts the dry dock that had the 076 assembled.