pBFS Guided aiTBS Over Language Network for ASD Child

Who May Qualify: 1. Professionally diagnosed with ASD per DSM - 5 criteria. 2. Aged 3 - 6.5 years, either gender. 3. ADOS-2 results meet ASD standard cut - off. 4. SCQ score: ≥15 (age ≥ 4 years) or ≥11 (age \< 4 years). 5. Co-existing language disorder not explaining ASD symptoms. No organic speech organ lesions. CNBS-R2016 and CLAS-TP language-related equivalent age \> 18 months; any CLAS-TP dimension score \< 6. 6. Mandarin is the daily communication language. 7. May have intellectual/global developmental delay not explaining ASD symptoms. 8. Guardians volunteer, can cooperate in treatment and sign willing to sign a consent form. Who Should NOT Join This Trial: 1. Identified genetic pathogenic factors; current/past comorbid severe disorders (ADHD, Tourette's, etc.). 2. Serious self-harm in the past year. 3. Severe sensory/motor disorders precluding cooperation. 4. History of epileptic seizures. 5. Serious organic diseases, especially brain related. 6. Contraindications for MRI/TMS (metal/implants). 7. Respiratory/circulatory diseases with sedation risk. 8. Illiterate guardians unable to handle willing to sign a consent form/questionnaires. 9. Received neuromodulation in the past 3 months. 10. Currently in other clinical trials. 11. Deemed unfit by the researcher. Always talk to your doctor about whether this trial is right for you.