Considering how difficult it is for a college find a job, I don't think the navy will have trouble manning those ship. After a naval officer is still a civil servant. Which is highly thought after position in Chinese society even though enterprises offer better pay, first and foremost because of housing benefits. Also with more modern ships, less crew will be required. 056 is probably the only option if you want to replace Ludas and Jianghus are one-to-one basis for coastal patrol, while still have enough ships for a carrier fleet for a blue water deployment.