Interesting image. Green circle is the 003 (called 002 on this forum) and it shows a very large chunk already assembled. With possibly even larger piece, hidden by the movable roof cover. We're talking about 100+ meters of ship hull being assembled, almost to the main deck level.
Red circle is probably nothing of significance. I am guessing that's the commercial shipbuilding. But it's peculiar to me that the roof covers have appeared there as well, in great numbers. Since there's no reason for commercial shipbuilding to be hidden from view, the only reason one'd go into such expense is to improve the quality of the build. To prevent rain/snow. Or possibly to give better working conditions to the workers, though that too seems like an expense that's not warranted, especially in this day and age where there's an excess of commercial shipbuilding workforce due to low shipping demand.
Yellow circle is interesting too. There seems to be a warship like bow sticking out. Those halls were used to build early few 052Ds, but then they switched to assembling them out in the open. Now they may be going back to building them inside. Would that suggest that there's not enough space to assemble them outside? Perhaps 055s will be built for some time more?