Confirm that the installation is complete. According to Master Wan's national home furniture after-sales service platform. Master Wan's door-to-door installation master will ask the user to confirm whether the work is completed, sign it and upload it to Master Wan's after-sales system. Master Wan is a home after-sales service platform, providing one-stop after-sales services such as home distribution, installation, repair and maintenance for home e-commerce enterprises, logistics service providers, offline home sellers and other corporate users.