I'm going to borrow Golle's idea and write a "what if" design.
In the 1970s-1980s, the PRC was at odds with the USSR and was able to obtain limited western assistance in military modernization. After a study on installing Sea Dart SAMs on Luda DDG's determined that it wasn't feasible, the PLAN commissioned a new class of ships, based on a mix of imported British design (Type 82) and domestic design. 2 hulls were laid down in 1980's and fitted with imported systems from UK and AUS.
During this time, a ship in the 4,000 ton displacement range would still be classified as a "Destroyer". The new ship is designed to be 6,000-7,000 ton displacement range and classified as a "cruiser", though by 1990s newer PLAN destroyers would have similiar displacement. The "new" PLAN Guided Missile Cruiser is also the first and only PLAN major surface warship without a main gun.
PLAN Guided Missile Cruiser CG-X
Displacement: 6,000-7,000 tons
Length: 140-150 m
Beam: 15-16m
Crew: 400-450
Power: COSAG with 2 x domestic steam turbines + 2 imported Rolls Royce Gas Turbines
Speed: 28-30 knots maximum
Electronics: Mix of imported British systems & domestic systems
Sonar: Type 170 & 184 hull-mounted sonar system + towed VDS
Weapons:
GWS30 Twin-Arm Sea Dart SAM launcher with 32-40 rounds in auto-loader magazine, 2 x Type 909 illuminators. System can intercept 2 aerial targets at same time.
Ikara A/S launcher with 16-32 rounds
4-8 x C-801 SSM
4 x Type 76 Twin 37mm AAA guns
2 x Type 949 16-barrel chaff/decoy MLRS
2 x Type 72 240mm 12-tube ASW MLRS
Aviation:
Deck + hanger for 1 x ASW helicopter
Note: I'm not certain how much weapons you could actually squeeze on a platform like this in 1980s, so I've left the weapon ammuntion specs with a "range" like "16-32".
This ship was a "new concept" guided missile cruiser, intended to operate in a group and serving air-defense as well as ASW roles. Although it was the largest and most technically advanced ship in the PLAN, its captain and crew often complained about the missing main gun, comparring to an infantry's rifle without the bayonet.
By 2000's the ship was due for a major refit. Its C-801 SSM's were replaced by C-803, and the old style Type 76 AAA were replaced by Type 76A's. Ammuntion for the Sea Dart and Ikara systems were reaching its maximum shelf life and had to be replaced by reverse-engineered domestic copies. Some improvements were made to the ship's electronic systems, as well as an updated battle mangement system. The decoy/chaff and ASW MLRS were also replaced with newer versions.
I'll write another post for a "modern" missile cruiser later.