Poconopenn,
The shape of the 5 stars cannot lie.
Shanghai coins has small stars, and Shenyang coins has large stars. The NGC set shows large stars, consistent with coins minted by Shenyang Mint. Look at the photos in reply #96.
If you get the chance, take the NGC coins and compared it against a pair of 1985 Great Wall $1, both Shengyang (wide date) and Shanghai (narrow date).