The car can’t start when it’s cold. Please help me analyze it.

1. The battery is out of power, or the connecting wire is disconnected or the connector is loose; 2. The contacts of the starter relay are severely ablated or its coil is disconnected; 3. The contacts of the starter electromagnetic switch are severely ablated or its coils are disconnected; The suction coil is open circuit; 4. The internal winding of the starter DC motor is open circuit or short circuit; 5. The starter armature shaft is bent, and the gap between the shaft and the bearing is too tight; 6. The commutator is severely ablated, the brushes are too worn, and the brushes are in The brush holder is stuck or the brush spring is too soft.