Zhao Yi and the large Expert Group continuously visited many departments and working groups, gaining insights as they alternated between walking and stopping. There were some types of research and development that he had never even heard of, yet they were vital to aircraft carriers and warships.
They also visited the nuclear reaction workgroup. Unfortunately, the nuclear reaction workgroup only established an office here, which had very few materials and was mostly occupied by 'civilian' personnel.
It makes sense, though.
The nuclear reaction workgroup is responsible for research on small nuclear reactors. The level of confidentiality and safety has been upped, and the required research conditions are stringent. The significance of 'armchair strategizing' is minimal, so it's unlikely that a permanent workgroup will be established here.
There are still researchers in the nuclear reaction workgroup, including the famous atomic energy expert, Hu Linsheng.