Why make too many 056? Isn't it enough already if their role are just for patrolling the LCS and doing ASW mission? Or they intent to use 056 as their backbone of the navy?
The PRC has a huge, long coast that needs relatively smaller vessels to patrol.
The Type 037 and other older vessels have typically done this and the Chinese had a LOT more of them.
These are newer and more effective so they will not need 150 of them, but they will certainly need a lot of them. Perhaps as many as 70 or 75.
These types of patrols do not require large frigates or destroyers, the PLAN needs a lot of those to patrol further off shore, and particularly to protect sea lanes and lines of communication across to the seas to the areas of the world where China has interests.
So, no, the Type 056 will not be the most of their navy, but they will need a lot of these smaller, yet effective modern vessels to patrol closer into shore, or around islands in the SCS directly unless heavier forces are needed.