To absolutely cover the benefit for the employer ‘s advertising through the contract, whenever any defect of ad board happens; for example, the board may be torn, any light or all on the circuit are off, the employer shall immediately inform the employee to repair such defect within 7 days since the date of having been informed. Notwithstanding, scope of benefit does not include particular damage from benefit of trade during rectification of the signboard, the advertising fee or other expenses will be discounted in accordance with actual incidence.