A Double-blind, Randomized Controlled Clinical Study on the Intervention of Cognitive Impairment in Cerebral Small Vessel Disease by Wen Shen Yi Zhi Formula (a traditional Chinese medicine)

INTERVENTION: Intervention Group:Kidney‐tonifying and intellect‐enhancing formula;Control Group:Placebo; CONDITION: Cerebral small vessel disease PRIMARY OUTCOME: Change in Montreal Cognitive Assessment scores compared to baseline.; SECONDARY OUTCOME: MMSE Score;VaDAS‐Cog Score;ADL score;CDR‐SB Scale;TMT Rating;CDT Rating;NPI Scoring;TCM syndrome score; INCLUSION CRITERIA: (1) Meets the diagnostic criteria for cognitive impairment due to small vessel disease of the brain; (2) Meets the diagnostic criteria for deficiency of kidney yang with stasis in the meridians; (3) Hachinski ischemia score =7 points; (4) 16 = Montreal Cognitive Assessment (MoCA) =26; (5) Clinical Dementia Rating (CDR) =2 points; (6) Aged 40‐85 years, gender unrestricted; (7) Able to cooperate with trial examinations; (8) The volunteer subject and their guardian have signed the informed consent form.