Sync. How it works? Sync child

Hello. How can I sync GameObject(tank) and his Turret. I need to sync Tank only 2D x,y. Turret ONLY Z Rotation! How is it possible? I never used sync in Photon, But I saw someone written for very fast rigidbody objects need another type of sync and slowly object another, Is it Right? Because I need also Sync Bullets.