Xing Liu, Assistant Professor at the Institute for Agro-food Standards and Testing Technology, Shanghai Academy of Agricultural Sciences (SAAS). The educational background, work experience, and research interests are as follows: 1. Education Background (1) 2016-2012, College of Agriculture and Biology, Shanghai Jiaotong University (China), Ph.D (Biomedical Engineering) (2) 2009-2012, Longping Branch, Graduate School, Central South University, M.S. (Agricultural Products Processing and Storage Engineering) (3) 2004-2008, College of Food Engineering and Nutritional Science, Shaanxi Normal University, B.S. (Food Science and Engineering) 2. Work Experience and Research Interests (1) Jul. 2016 -Present Institute for Agro-food Standards and Testing Technologies, SAAS Developed a multi-technique model integrating stable isotope analysis (δ13C, δ15N, δ2H and δ18O), NIRS, and nutritional profiling; Agricultural product authentication: origin, cultivation methods (organic, green and conventinal), and varietal identification. (2) Aug. 2023 – Aug. 2024 National Isotope Centre, GNS Science, Lower Hutt, New Zealand Utilized compound-specific stable isotope techniques for: 1) source tracking of nitrate pollution in drinking water (δ¹⁵NNO₃⁻/δ¹⁸ONO₃⁻); 2) tracing sulfur contamination sources through δ³⁴S patterns in environmental samples.