Abstract: The breakthroughs of "bottleneck" technologies are critical to national security and overarching development strategies. The "cross-industry and cross-domain industrial internet" platform enables digital intelligence technology. This technology enhances the capabilities of specialized, refined, distinctive and innovative (SRDI) enterprises, creating new opportunities to address the technical challenges of "bottleneck" technologies. Grounded in the theories of digital intelligence enabling and resource arrangement, this study conducted a longitudinal case analysis of how COSMOPlat enabled Qingdao Choho Industrial Co., Ltd. to overcome these "bottleneck" technologies. The key findings include: (1) The breakthroughs of "bottleneck" technologies progress through stages of technology accumulation, breakthrough and iteration. During these phases, two mechanisms—digital and intelligent enabling that promote resource arrangement and their co-evolution—play pivotal roles. (2) In the technology accumulation stages, SRDI enterprises independently build expertise in specialized fields and foundational digital and intelligent technologies. (3) In the technology breakthrough phase, the "cross-industry and cross-domain industrial internet" platform facilitates data and technology enabling, thus enabling SRDI enterprises to orchestrate data and technology resources, and enhancing innovation efficiency. Subsequently, structural enabling prompts SRDI enterprises to engage in process resource arrangement actions which reshape the innovation model. Through this dual coordination, SRDI enterprises achieve breakthroughs in "bottleneck" technologies. (4) In the technology iteration phase, the "cross-industry and cross-domain industrial internet" platform extends the cross-industry and cross-domain enabling, allowing SRDI enterprises to conduct multi-ecosystem-level resource arrangement actions that support the continuous iteration of "bottleneck" technology innovations. This research has enriched the understanding of breakthroughs in "bottleneck" technologies, expanded the interaction mechanisms between digital intelligence enabling and resource arrangement, and it will offer significant insights into leveraging the "cross-industry and cross-domain industrial internet" platform for the digital intelligence enabling of SRDI enterprises across various dimensions.

Key words: "cross-industry and cross-domain industrial internet" platform, "bottleneck" technology breakthrough, SRDI enterprise, digital intelligence enabling, resource arrangement