Shenyang Aircraft Corp to start the construction of a new manufacturing/assembly hall. Length ~750 meters x Width ~290 meters x Height ~16 meters. Total build-up area is ~280 thousand m2.
Slated to start construction on the 19th this month, expected completion by the late-June 2025. Serial production inside the hall can be expected to begin sometime in 2026 or 2027.
Posted by @伏尔戈星图 on Weibo.
It is said that this new Shenyang hall is comparable in size to the USAF Plant 4 building (responsible for manufacturing F-35s) in Forth Worth, Texas.
According to him, the mass production of the J-35/31 can be expected in the future once the new hall enters operation.
Personal comment (in Italic):
Perhaps this could also be hinting towards PLAAF operating land-based variant of the J-35/31 in the future?
Note that I cannot vouch for the veracity of this
(merely based on viewing other people's comments and my own gut feeling), so please reserve your judgement until official confirmation is available.