Established in 2010, LID is a supplier and installer firm of special doors and services for industrial. At LID, we believe there is a better way to do marketing. A more valuable, less invasive way where customers are learned rather than bought. We are exactly passionate it, and our mission is to help people earn and use the doors easily. We focus on customer relationships and their requirements. We are excited to do works with our clients, we try our best to make perfect doors in their industry areas.