"The world’s information systems are arguably owned by American and Chinese companies. So far, studies on China’s globalising Internet adopt either monolith approach or fragmented approach, lacking a comprehensive image to capture the architecture of China’s global information systems. Critically adopting the metaphor of ‘platformisation tree’, this article maps China’s network of global platform ecosystems and identifies its main stakeholders, based on a 2022–2023 ethnography with Chinese tech personnel and venture capitalists in Shenzhen, Indonesia and Vietnam. It argues that China’s globalising Internet shows a triangulation of China, the US, and recipient countries. Similarly to how vines grow and spread using various climbing strategies, Chinese tech companies have developed their ecosystem of digital infrastructures, intermediary platforms, and sectional apps. However, they significantly depend on the GAFAM (Google, Amazon, Facebook, Apple, Microsoft)-led ecosystem, interact with their surroundings, and embed deeply into recipient countries’s digital geographies. This research provides a grounded, empirical perspective to the contemporary debate on China’s digital expansion, highlighting varying techno-mediated positionalities and socially driven innovation in the Global South. It contributes to the conceptualisation of ‘global platform ecosystems’ as a relational and ecological social technical system, situated within a dynamic integrity of ‘centre-periphery’, ‘onlineoffline’and ‘human-non-human’." (Abstract)