Creos Luxembourg, Fluxys hydrogen in Belgium, and GRTgaz in France have jointly announced the integration of the HY4Link project into the European hydrogen network development plan, marking a significant advancement towards becoming a Project of Common Interest. This collaboration includes signing a Memorandum of Understanding to enhance their cross-border hydrogen infrastructure cooperation. The HY4Link project envisions conducting feasibility studies to analyze consumption and transit needs for establishing an integrated cross-border hydrogen transport system in the Greater Region, spanning across Belgium, Luxembourg, the Grand Est region in France, and the federal state of Saarland in Germany. The initiative aims to link industrial hydrogen demand centers in France, Germany, and Luxembourg with green hydrogen supply centers along the North Sea coast and import hubs in Antwerp, Zeebrugge, Rotterdam, and Dunkirk, playing a pivotal role in the European hydrogen infrastructure development. Furthermore, the project seeks to facilitate the decentralized green hydrogen production in the Greater Region by creating the essential hydrogen transport infrastructure. Specifically, for the France-Luxembourg segment of HY4Link, Creos Luxembourg and GRTgaz will explore developing an interconnected network connecting Bouzonville in France to Frisange in Luxembourg via Thionville, which will be a cornerstone for establishing a hydrogen infrastructure in southern Luxembourg. On the other hand, for the Belgium-Luxembourg part, a potential pipeline connection will be explored between Creos and Fluxys hydrogen to link Luxembourg to the Belgium Hydrogen Backbone through Bras. This connection will be reinforced with a hydrogen pipeline across Luxembourg to France and Germany, supported by GRTgaz's plans for a new pipeline from Thionville to Cerville to connect the H2Med corridor and a regional hydrogen storage project. Creos Luxembourg, GRTgaz, and Fluxys hydrogen are essential players in the energy sector, with each contributing their expertise to drive forward this ambitious cross-border hydrogen infrastructure project.