Let's be real. Russians can't handle the sophistication of a military like France. They will zergrush and force them into an artillery battle. The French will be depended on the Yanks facing the Russians. In case of China the French will be riding the coattails of the USN. The French have 7000 ton destroyers.
The PLA has 10000 ton destroyers that they can chuck out within a span of 3 months and are far more heavily armed than the average French FREMM frigate.
The average French "destroyer" has 48 VLS for air-defence and 8 anti-ship missiles. The average PLAN Destroyer has 112 VLS on top of that 24 more for anti-air.
The Russians are far more advanced than you think.
As for destroyers, it's about anti-ship firepower, not anti-ship and anti-land. For the former, small ships with 8-16 missiles are sufficient. But yeah, they have buried their heads in the sand concerning China. They have focused almost entirely on protecting only France instead of working to double their navy.