There are 2 inherit problem China face vis-a-vis US Navy. The first problem is US is a global faring force with 14 different forward deploy point (Bases in Japan, South Korea, Singapore, Spain, Italy, Africa, Indian Ocean and Oceania) , while China have 0, US is ALWAYS going to be able to handle more ship than China, US is expecting to have 100 Arleigh Burke Class by 2030 when the first ship of the class retire and the DDG(X) Program started, China would not be able to have the same number since they will have to base them all within their coastline.
Second issue is the US Combine (Joint) Task Force concept, US Navy don't operate their fleet like a fleet, they operate as a Special Multi-Nation Task Force, 4th and 5the Fleet is not just with 4th and 5th Fleet, but they operate as CTF-150 that have element of Spanish, German French and British (or any number of NATO partner), which always give them numerical superiority. Take Asia for example. if there is ever a war between US and China, China would have to content the issue that US bases in Japan, South Korea, Philippine, Diego Garcia (UK), Singapore and Australia. Do China leave these base untouched? or do they attack them and drag perspective country into war? The CTF Concept in Asia evolve around all these nations. Because China wouldn't be facing 3rd and 7th Fleet alone, they are going to have to face the naval might of all those countries.
Technological wise, the gap for PLAN vis-a-vis US Navy is still quite big, things are catching up a bit and you can probably offset some gap with advance drone, but then PLAN is still about decade to 15 years behind the US.