The National Digital Preservation Program (NDPP) is China’s largest “dark archive” network, dedicated to the long-term preservation of digital scholarly publications. To address the growing scale, diversity, and complexity of the scholarly record, NDPP has developed a next-generation in-house preservation system built on an open-source private cloud stack. The system offers a comprehensive suite of OAIS-compliant functions that support full life-cycle object management and routine archival operations. Archival Information Packages (AIPs) are structured using widely adopted standards—METS, PREMIS, Dublin Core, and OCFL—to ensure interoperability and self-descriptiveness. Dynamic scalability is achieved through containerized microservices, while high-performance processing of large-scale submissions is enabled by parallel processing mechanisms. Customizability is supported through a configurable preservation plan, dynamic plugin extensibility, and workflow orchestration. The system also integrates risk-aware, proactive preservation management. Currently, the platform supports seven categories of scholarly resources. Performance evaluations demonstrate a 5- to 15-fold increase in ingestion throughput on a Kubernetes cluster with 3 worker nodes.