The goal of this clinical trial is to learn about effectiveness and safety of washing microbiota transplantation in diabetic gastrointestinal motility disorders participant population. The main questions it aims to answer are: * The risk factors of diabetic gastrointestinal motility disorders in routine clinical data or biochemical tests. * The composition of gut microbiota in diabetic gastrointestinal motility disorders patients and potential pathogenic bacteria. * The efficacy of washing microbiota transplantation in the clinical treatment of diabetic gastrointestinal motility disorders patients and potential factors that may influence treatment outcomes. * The potential mechanisms of washing microbiota transplantation in treating diabetic gastrointestinal motility disorders patients. Participants will be collected fasting venous blood and random stool samples before treatment and at week 12 post-treatment, conducting scale assessments before treatment and at weeks 1, 4, and 12 post-treatment.
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Gastrointestinal Symptom Rating Scale
Timeframe: 0 days，weeks 1, 4, and 12 post-treatment
Gut Microbiome Sequencing
Timeframe: 0 days，weeks 12 post-treatment