Inclusion Criteria:
1. Age 18-79 years (inclusive), male or female;
2. Meet diagnostic criteria for essential hypertension, and satisfy one of the following conditions:
Grade 1 hypertension with no antihypertensive drugs in the past 2 weeks; Receiving stable treatment with one standard-dose chemical antihypertensive agent for at least 4 weeks, with blood pressure（BP）140-159/90-99 mmHg, and is willing to maintain the treatment regimen without adjustment;
3. Insomnia Serverity Index (ISI) score ≥ 8, symptoms occur for at least 3 nights per week and have persisted for no less than 3 months;
4. No sedative-hypnotic drugs have been taken within the preceding one month;
5. Is able to complete scale assessments independently;
6. Is willing and able to comply with all examinations and observations specified in the protocol; Has provided written informed consent.
Exclusion Criteria:
1. Severe hypertension (mean SBP ≥ 180 mmHg and/or mean DBP ≥ 110 mmHg); malignant hypertension, hypertensive emergency, hypertensive crisis, hypertensive encephalopathy, etc.
2. Suspected secondary hypertension (renal parenchymal hypertension, renovascular hypertension, obstructive sleep apnea, primary aldosteronism or other endocrine hypertension, drug-induced hypertension, monogenic hypertension, etc.);
3. Clinically significant laboratory abnormalities at screening: ALT \> 1.5 × ULN, AST \> 1.5 × ULN, or Serum creatinine ≥ 2.0 mg/dL;
4. Chronic gastrointestinal disorders accompanied by frequent abdominal pain or diarrhea, or history of gastrointestinal surgery that may impair drug absorption;
5. A history of allergic diathesis or hypersensitivity to any component of the investigational product;
6. Pregnant females，or those with a positive pregnancy test at screening, women planning pregnancy during the study, lactating women, or fertile women without adequate contraception protection;
7. Clinically severe and unstable hepatic, renal, hematologic disease, malignant tumor, or unilateral/bilateral renal artery stenosis;
8. Documented psychiatric disorder, or GAD-7 score ≥ 10 or PHQ-9 score ≥ 10;
9. Insomnia due to hyperthyroidism, restless legs syndrome, narcolepsy, sleep-related movement disorders, etc.;
10. Insomnia due to neurodegenerative diseases (Parkinson's disease, Alzheimer's disease, epilepsy, etc.);
11. Acute stroke;
12. Confirmed diagnosis of OSA or STOP-BANG score ≥ 5;
13. Night shift or rotating shift workers;
14. Suspected or confirmed alcohol or drug abuse/dependence;
15. Participation in another clinical trial within 3 months prior to screening; Any other condition deemed by the investigator to render the subject unsuitable for the trial.
