Therapeutic Protocol for 'Five-Tone' Therapy Based on Melodic Intonation Training Model: Subjects undergo syndrome differentiation and treatment, with corresponding 'Five-Tone' melodies selected for active training based on the melodic intonation intervention model. Intervention duration: All eligible participants in this study received four weeks of treatment, administered once daily for 40 minutes, five days per week.

Melodic intonation training. Intervention duration: All eligible participants enrolled in this study received treatment for 4 weeks, once daily for 40 minutes, with sessions conducted 5 days per week.

① Rehabilitation training: Physicians conduct limb movement and speech rehabilitation training for participants in accordance with the Clinical Evidence-Based Practice Guidelines for Integrated Traditional and Western Medicine Rehabilitation of Stroke (2024 Edition). ② Conventional Medical Management: Standard foundational treatment is administered to enrolled subjects in accordance with the National Health Commission's Guidelines for the Prevention and Treatment of Cerebrovascular Diseases (2024 Edition). This encompasses: management of underlying causes, blood pressure control, antiplatelet therapy, anticoagulant therapy, and regulation of blood glucose and lipid levels. ③ Health Education: Health education is provided to subjects to raise awareness of the severe risks associated with stroke and the available rehabilitation interventions.

Therapeutic Protocol for 'Five-Tone' Therapy Based on Melodic Intonation Training Model: Subjects undergo syndrome differentiation and treatment, with corresponding 'Five-Tone' melodies selected. Based on the melodic intonation training model, active training is conducted through melodic intervention measures. ① Rehabilitation training② Conventional Medical Management.③ Health Education:

The semantic fluency test requires subjects to say as many words related to a given semantic category as possible within 60 seconds, such as furniture, occupation, etc. The more words they say, the better the surface semantic fluency.

Verbal Fluency Test: Participants are required to produce as many words as possible within 60 seconds that belong to a specified phonetic category, such as words beginning with "yi". A higher number of words indicates greater apparent verbal fluency

BDAE Aphasia Severity Grading Scale ranges from 0 to 5, with higher grades indicating better language ability.

Grading and Language Performance Grade 0: No meaningful speech; no auditory comprehension. Grade 1: Discontinuous speech in communication, but mostly requiring listeners to infer, ask questions, and guess; limited scope of communicable information; listeners find verbal communication difficult.

Level 2: With listener assistance, conversation on familiar topics may be possible. However, expressing thoughts on unfamiliar subjects is often impossible, causing difficulty for both patient and examiner.

Level 3: With minimal or no assistance, the patient can discuss nearly all everyday matters. Yet, due to diminished verbal and/or comprehension abilities, certain conversations prove difficult or unlikely.

Level 4: Speech is fluent, though perceptible comprehension difficulties may be noted. Thought and verbal expression remain largely unrestricted.

Level 5: Minimal discernible spee