Idle space (potential offline ad spots) is anywhere, including but not limited to restaurant tabletops, shop windows, lift door and large surface wall. While all companies need promotion, and offline marketing is one essential channel for any marketing campaign. We are providing a web platform to facilitate different kind of advertisement spots to be visible in the market. Through the platform, people can easily submit their advertisement spots with a rental price. Other users like SME owners, marketing team from enterprise, advertising agencies can base on target audience, location and price to compare and find suitable advertisement spots for promoting products and increasing sale amount directly. LeDo ADs is not only a leasing platform; we also provide one-stop service to the advertisement spot tenant, including advertisement design, printing and delivery service. It is a platform for our users to manage their marketing campaign from seeking advertisement location to promotion materials being posted.