This document proposes a project called SCHDU to reduce HIV transmission among injecting drug users in Ho Chi Minh City, Vietnam. It involves establishing an integrated network of services including a mobile clinic, detoxification center, and website to provide harm reduction, treatment, and community support. The goals are to distribute healthcare, reduce HIV transmission through coordination of services, demonstrate improved treatment adherence and outcomes, and support clients' rehabilitation and reintegration into the community. Key services proposed include outreach, counseling, detoxification, medication-assisted treatment, and linking clients to long-term support.