This article delves into the significant role of Bombardier Transportation's joint venture (JV), BST (Bombardier Sifang Transportation), in the maintenance and development of China's high-speed rail network. We will examine the substantial $357 million maintenance contract awarded to BST by China State Railway Group (CSRG), analyzing its implications for both BST and the broader Chinese railway industry. The analysis will explore the strategic importance of this contract within the context of BST's history, its capabilities, and the ongoing expansion of China's high-speed rail infrastructure. Furthermore, we will consider the wider implications for international collaboration in the railway sector and the technological advancements driving the industry's growth. This case study provides valuable insight into the complex dynamics of large-scale railway projects, the importance of after-sales service, and the global reach of major railway technology providers.