Enhancing the global influence of Chinese enterprises in technology standards is crucial for achieving high-level S&T self-reliance. This study applied the network orchestration theory to explore how CRRC Zhuzhou Locomotive Co.，Ltd. has contributed to integrating standards along the Belt and Road Initiative. The study found that： （1） The evolution of the technology standards innovation ecosystem in the joint development of the Belt and Road Initiative shows clear stage-based characteristics. During the iterative process of "incubation-expansion-stable development，" the dependency on network relationships and the level of technological complementarity gradually increase. The ecosystem follows a trajectory that evolves from localized pilot projects to global coordination. （2） The network orchestration practices of core enterprises play a critical role in the implementation of governance mechanisms within the ecosystem. These practices consist of three key components： legal coupling exploration，innovation leverage management，and network ecosystem expansion. The study identified a shift in governance from a single-firm-dominant to co-governance. （3） The governance logic of the jointly developed Belt and Road technology standard innovation ecosystem shows a transition from legitimization logic to integration logic. This study has developed a theoretical framework that extends application of the network orchestration theory in a multi-national context. It has also explored how Chinese enterprises navigate technological breakthroughs and standard-setting under the pressures of Sino-US technological decoupling.