The DF-27 has a range of 8,000km
I bet in the future, China will build a 12,000km range ASBM
Granted such a missile system would be expensive so it would be fielded in limited numbers. It would supplement, not necessarily replace pre-existing weapon systems. However the temptation to build a missile that can hit any ship in the Pacific ocean regardless of it's position whether it's off the coast of Shanghai or docked in San Diego is too good to pass up.
I'm sure the Chinese are secretly working on the project right now.
An ASBM is an A2/AD weapon whose purpose is to prevent enemy aircraft carriers from entering effective strike range. With a range of 4,500 km, the DF-26D can strike US carrier strike groups from central China before they enter strike range. A longer range is not particularly significant for an ASBM; on the contrary, missiles with greater range tend to be larger and heavier, making them harder to maneuver and conceal, while also increasing costs and requiring more personnel for operation and maintenance. Consider the DF-31, with a range of approximately 8,000 km, is 50% longer and 50% wider in diameter than the DF-26, resulting in a volume three times that of the DF-26.
Although China already possesses ballistic missiles with longer ranges, the 4,500 km range of the DF-26 missile is clearly a rational choice made after comprehensive consideration. Future development of ASBMs will focus on more advanced guidance and enhanced penetration capabilities, unless the strike range of future US CSG significantly exceeds 3,000 km, the range of the ASBM will not see a significant increase.