A plant packaging and covering system comprising a floral sleeve having a base portion and skirt portion. The auto-focusing method uses a lens position error compensation and includes: detecting a target object during a photograph mode; determining a lens position at which a focus value gradient related to the detected target object changes sign while moving a lens of the camera module in units of one step size; and performing lens position compensation by moving the lens to the found lens position. According to the above structure of the present invention, there can be provided a ceramic circuit board having an excellent heat-cycle resistance and bending strength characteristics without impairing a heat radiating property, and capable of increasing an operating reliability as electronic device. Further, the tab is movable between a closed position such that a portion of the tab is adjacent to the contact to secure a wire inserted through the opening in the front wall against the contact and an open position such that the portion is farther away from the contact than in the closed position to release the wire, the spring biasing the tab toward the closed position.