NTN2021 is a four-manual and pedal organ by Rieger that has evidently been installed in the new Concert Hall of the Nantong Grand Theater. Nantong is a river port on the north bank of the Yangtze River, northeast of Shanghai. It incorporates the old (and better known) towns of Haimen and Tongzhou.
Rieger has not yet posted the specs of this instrument, but a brief description can be found at: https://www.rieger-orgelbau.com/projekte/?lang=en
We thank our correspondent, Julie Zhu, for the main photo and for bringing this installation to our attention.