Does anyone know more? According to this post, this J-10CE (cn. 9001) was built by the Guizhou Aircraft Company!
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Shows that Chengdu AC is very much busy rolling out more and more J-20/As, such that (and also verifying) that the J-10 production has been moved to Guizhou AC in order to free up more production line slots for the J-20 production.
A highly encouraging development indeed, let alone a new assembly hall that's under construction at Chengdu (from 2023).
Plus, J-20 production-related matters aside, Guiyang AC also got their hands onto producing proper fighters too. Would be very useful for Guiyang to potentially serve as a secondary production site for the J-20/As and UCAVs in case the need arises.
In the meantime, perhaps Shenyang and Hongdu can also come to similar cooperation frameworks as well for those Sino Flankers...