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While interactions between machines and their environment inevitably occur, the fundamental question of how spatial confinement affects the motion dynamics and the controllability of speed, direction and lifetime of such liquid metal machines (LMMs) remains underexplored. Understanding these confined dynamics is essential for practical applications. Here, we present a comprehensive investigation of the non\u2010symmetrical fuelling principle governing the direction\u2010tuning effect in LMMs. By confining LMMs within one\u2010dimensional semi\u2010open channels, we thoroughly disclose their impact and turning dynamics with different end obstacles throughout their lifecycle, with particular focus on fuel region morphological evolution, overall motion and local flow characteristics after reaction times exceeding one hour. Utilising ultra\u2010high\u2010speed imaging techniques, we systematically clarify how fuel region evolution and end\u2010obstacle interactions influence symmetry\u2010breaking mechanisms and reciprocating dynamics. Our findings reveal complex interactions between material properties, charge transfer processes and fluid dynamics during end\u2010turning processes, establishing a theoretical foundation for LMM driving dynamics. Beyond the theoretical mechanisms, we further demonstrate that LMM exhibits efficient heat and mass transfer capabilities, paving the way for applications in controlled transport systems and autonomous robotics.<\/jats:p>","DOI":"10.1002\/exp2.70227","type":"journal-article","created":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T04:21:33Z","timestamp":1791346893000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Impacting Fuelling Dynamics Towards Tunable Liquid Metal Machine"],"prefix":"10.1002","author":[{"given":"Jingyi","family":"Li","sequence":"first","affiliation":[{"name":"Key Laboratory of Cryogenic Science and Technology, Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing China"},{"name":"School of Future Technology University of Chinese Academy of Sciences Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Minghui","family":"Guo","sequence":"additional","affiliation":[{"name":"Key Laboratory of Cryogenic Science and Technology, Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ju","family":"Wang","sequence":"additional","affiliation":[{"name":"Key Laboratory of Cryogenic Science and Technology, Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing China"},{"name":"School of Future Technology University of Chinese Academy of Sciences Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xi","family":"Zhao","sequence":"additional","affiliation":[{"name":"Tianjin Key Laboratory For Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering Tianjin University of Technology Tianjin China"},{"name":"National Demonstration Center For Experimental Mechanical and Electrical Engineering Education (Tianjin University of Technology) Tianjin China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jing","family":"Liu","sequence":"additional","affiliation":[{"name":"Key Laboratory of Cryogenic Science and Technology, Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing China"},{"name":"School of Future Technology University of Chinese Academy of Sciences Beijing 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