Those are the remains of two belts of HQ-2 sites (The new “Great wall”) left over from the cold war remain active which now have S-300 missiles.
S-300 missiles — which are useless against incoming ICBMS.
Only the Russians have effective defenses against mass ICBM attacks and have been uprgading those systems since the mid-60s when they went operational. Nixon knew the Anti-ICBM Treaty was a farse when he signed it - good for political points at home and useful to stop real manned space flight endevours using nuclear power.
S300-S400 are the export models (and descended from) another secret not exported system used for defense against mass ICBM attacks.