This is the official mobile application of the Construction Workers Mutual Aid Association, which strives to promote employment stability and welfare of construction workers with a focus on the retirement mutual aid payment business. We provide information on retirement mutual aid programs and employment welfare programs operated by the Mutual Aid Association.○ Provision of information for construction workers - Retirement deduction project: Provides system information, how to apply for retirement deductions, and a function to check the number of days accumulated in detail, etc. - Employment welfare business: Skill improvement training, free employment support, welfare business information - Customer Center: Frequently Asked Questions, Q&A, Suggestions - Location information: Mutual aid association office guide and directions, etc.