I am so excited to hear that the 056s are officially meant to have an anti-sub role as this was somewhat in doubt before.
Based on the crew needed per 056 at 1/3 that of a 053, the fact that there are around 20 053s and Jiangwei Is in service (don't know if the Jiangwei IIs will also be replaced), and that the 056 is officially meant to be mass produced to replace the 053 family of ships, it looks like at least around 50 up to maybe 70 056s are planned!
Based on the crew needed per 056 at 1/3 that of a 053, the fact that there are around 20 053s and Jiangwei Is in service (don't know if the Jiangwei IIs will also be replaced), and that the 056 is officially meant to be mass produced to replace the 053 family of ships, it looks like at least around 50 up to maybe 70 056s are planned!