Transcranial Magnetic Stimulation Combined With Language Training for Language Disorders in Global Developmental Delay

Inclusion Criteria: 1. Children aged 2-5 years old, regardless of gender. 2. Meet the diagnostic definition of GDD in China's Diagnostic Guidelines for Global Developmental Delay (2024), confirmed by Gesell Developmental Schedules (GDS), and the Developmental Quotient (DQ) of the language domain is ≤75. At least one other of the four developmental domains, adaptive behavior, personal-social behavior, gross motor, and fine motor, had a DQ ≤ 75. Mild-moderate GDD was selected for the study. 3. The presence of significant language developmental delay, the language ability is significantly lower than children of the same age and the same intellectual level, confirmed by the standardized scale of Sign-Significate Relations (S-S) assessment. 4. The child is able to cooperate with the completion of TMS treatment and language assessment and has no serious behavioral problems. 5. The guardian of the child understands the content of this study and voluntarily signs the written informed consent. Exclusion Criteria: * 1\. history of epilepsy or convulsive seizures. 2. having metal implants in the skull (e.g. aneurysm clips, metal stents, etc.) and electronic devices such as pacemakers and cochlear implants in the body. 3\. other serious neurological conditions that may affect language function (e.g., cerebral palsy, progressive neurological disorders, etc.). 4\. have a diagnosis of Autism Spectrum Disorder (ASD). 5. have a severe hearing or visual impairment. 6. participation in other clinical trials that may affect speech function. 7. breakage or infection at the scalp treatment site. 8.the fontanelle has not yet closed. 9. previous rTMS treatment in the last 3 months. 10. developmental quotient \< 40 in any developmental domains; other circumstances that prevented cooperation with the study.