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Inclusion Criteria:

1. 18 to 75 years , regardless of gender;
2. Clearly understand and voluntarily participate in the study, and sign the informed consent form;
3. In accordance with the diagnosis of coronary heart disease, and the following diagnostic criteria meet at least one of the following criteria: ① have a clear history of myocardial infarction; ② have accept the treatment of coronary artery revascularization; ③ coronary radiography or coronary angiography results show that at least one coronary artery stenosis and lumen stenosis ≥ 50%; ④ cardiac magnetic resonance imaging or radionuclide myocardial perfusion imaging or cardiac color Doppler diagnosis Coronary heart disease with myocardial ischemia;
4. Consistent with the diagnosis of stable angina pectoris;
5. Stable angina pectoris has been treated according to the clinical guidelines and has been stable for at least 4 weeks;
6. Meet the diagnostic criteria for depressive episode in 《the international statistical classification of diseases and related health problems (ICD-10)》 issued by the World Health Organization;
7. In the past 7 days, have not used any food that has an impact on intestinal flora, such as foods containing probiotics (such as yogurt) or drugs (such as antibiotics).

Exclusion Criteria:

1. Acute myocardial events, unstable angina pectoris, severe heart failure; serious arrhythmia; severe or poorly controlled hypertension (systolic blood pressure ≥ 180 mmHg or diastolic blood pressure ≥ 110 mmHg); sitting blood pressure and systolic blood pressure ≤ 85 MmHg or symptomatic hypotension, severe primary diseases such as liver, kidney and hematopoietic system, or serious diseases affecting their survival (such as tumor, etc.);
2. Serious suicidal tendency; Hamilton Depression Scale item 3 ≥ 3; bipolar disorder depressive episode in patients with epilepsy history, or depression secondary to other mental or physical diseases; alcohol and drug dependence within one year;
3. Abnormal liver and kidney function (ALT and / or AST \> 3 times of the upper normal limit, and / or CRE \> 2 times of the upper normal limit);
4. Patients who are currently taking anti anxiety drugs;
5. Pregnant women, lactating women, women of childbearing age who do not take effective contraceptive measures, or who plan to conceive during the trial, and whose pregnancy test results are positive before the test;
6. Those who have participated in clinical trials of other new drugs within 30 days before screening;
7. Other reasons the researcher thinks it is not suitable to participate in the experiment;
8. Those with allergic constitution are allergic to the ingredients contained in Ginkgo biloba dropping pills;

• Foshan, Guangdong, China
• Guangzhou, Guangdong, China
• Shenzhen, Guangdong, China
• Guiyang, Guizhou, China