Before we continue on the following, one important thing to note: While Dalian has experience of building a STOBAR carrier (Shandong), Jiangan has experience of building a CATOBAR supercarrier (Fujian).
However, when talking about CV-19 and CV-20 - Recall that the Jiangnan Shipyard leadership team visited Bohai Shipyard in mid-2020:
The top leadership of Jiangnan ship yard recently paid a visit to Bohai shipyard to conduct detailed exchanges on product development and personnel training, etc. This visit follows up on earlier exchanges between the two shipyards.
Of course, Bohai has a lot of experience building nuclear-powered submarines. Jiangnan has no experience with nuclear power plants. I wonder if this exchange has to do with the future nuclear icebreaker, which is likely to be built at Jiangnan.
As
@by78 has noted, Bohai has a lot of experience of building nuclear-powered ships and submarines, while both Jiangnan and Dalian do not.
Another relevant piece of information is the news of the construction of a dedicated onshore boiler testing facility in Jiangnan, dating back as early as 2020 or even 2019:
For what is worth, Jiangnan is building a dedicated onshore boiler testing facility. This facility will allegedly be used to verify the steam supply system of China's carrier nuclear reactors. The test boilers will be able to generate enough steam and steam pressure to test the bearing capacity of various pipes and valves as well as the steam turbines destined for the nuclear carrier.
The boiler testing facility at Jiangnan could very well be a direct result of collaboration and cooperation between Jiangnan and Bohai on the subject of marine nuclear propulsion.
In retrospect, while there are such news between Jiangnan and Bohai, there have been no such news (or at least that we are aware of) coming out between Bohai and Dalian. So it does come as a genuine surprise to me that Dalian would have the nuclear-powered CV-20 model in a celebration ceremony.
In fact, it would be a much bigger surprise if Dalian is the one to build China's first ever nuclear-powered supercarrier instead of Jiangnan, considering that Jiangnan is already well in-progress of developing boiler technology for use on marine nuclear reactors.
Therefore, it does beg two huge question marks:
1. Would
CV-19 be
conventionally-powered (
003 or
003A/B) or
nuclear powered (
004)?
2. Would
CV-19 be built in
Jiangnan or
Dalian?