Again, this is a new class of aircraft carrier. They need to be patient and learning. I am sure that as they fix out the difficulties, the construction would pick up.are they waiting to see how this one performs before starting construction on the next one? they should overlap the constructions otherwise it would take too long to form a fleet with 6+ carriers.
The 2020s is the learning decade, the 2030s will be the buildup phase.
The decisions taken today will shape PLA a hundred years from now, so no need to hurry.