A 57-year-old Chino Hills man was convicted Tuesday of shooting at a car with a man and two children in it over a dispute about a parking spot in Buena Park. Wei Chen was convicted of attempted voluntary manslaughter, three counts of assault with a firearm and shooting at a car, all felonies. Jurors also found true sentencing enhancements for personal use of a gun. Jurors rejected a felony count of attempted murder with a sentencing enhancement …