21(+?) Keels laid in 7 years.. The type 052d is being produced at a rate of more than 3 ships a year. Add to that more than 1 type 055 per year and thats 4+ DDG/CG every year.. !It still could be faster,I mean this destroyer contruction.
Thats more than USN DDG/CG production rate of 2.5 ships per year against the need of 100 Large Surface combatants.
If you take life of a commissioned combatant to be around 40 years, then PLAN is bound to have 150+ LSC sustaining this kind of a run.
If anything, i think it'll actually slow down over the coming years, while PLAN starts settling with even more capable, complex (bigger?) designs.. Although low in number..