The main function of Guilu Erxian Oral Liquid is to warm the shen (kindney) and replenish essence. It is used for chronic shen (kindney) deficiency, waist and knee weakness, spermatorrhea and impotence. The treatment of deficiency of kidney essence and asthenospermia is to invigorate the shen (kindney) and replenish the essence, nourish the shen (kindney) and assist the essence. The idea of combining traditional Chinese and western medicine is to move the yang and calm the yin, and traditional Chinese medicine is mainly to invigorate the shen (kindney) and replenish the essence. In order to better provide the basis for clinical medication and meet the treatment needs of oligozoospermia and asthenospermia, this trial is intended to evaluate the effectiveness and safety of Guilu Erxian oral liquid in treating oligozoospermia and asthenospermia with Syndrome of Shen (Kidney) Essence Deficiency subjects.

Inclusion Criteria:

1. Married men aged 22 to 40;
2. Meet the diagnostic criteria of male infertility;
3. Meet the diagnostic criteria for mild and moderate oligozoospermia, asthenospermia and oligoasthenospermia;
4. Meet the TCM syndrome differentiation standard of Shen (kidney) essence deficiency syndrome;
5. Sign the informed consent form voluntarily.

Exclusion Criteria:

1. Infertility due to chromosome abnormalities (such as Roche heterotopia, Y chromosome microdeletion, etc.);

2. Varicocele or cryptorchidism;

3. Diseases affecting semen quality such as orchitis, epididymitis, mycoplasma and chlamydia infection;

4. Anejaculation, retrograde ejaculation and other sexual dysfunction;

5. Severe liver and kidney dysfunction (alanine aminotransferase (ALT)>1.5 × ULN, aspartate aminotransferase (AST)>1.5 × ULN, blood urea nitrogen (BUN)>2 × ULN, Cr>1 × ULN), disease of cardiovascular and cerebrovascular system, disease of hematopoietic system;

6. Hypertension (systolic blood pressure > 160 mmHg and / or diastolic blood pressure > 100 mmHg) or diabetes (fasting blood glucose > 7mmol / L) with poor drug control;

7. Serious mental illness, accompanied by mental disorder or loss of self-care ability;

8. Those who are allergic to the test drug;

9. Those who have long term bad habits such as smoking and drinking, which may affect fertility, or those who cannot ban smoking and drinking during the test, the specific criteria are as follows:

   ①History of smoking: Those who have smoked more than 5 cigarettes per day in the past 6 months;

   ②History of drinking: in the past 6 months, the average daily consumption of alcohol exceeded the following standards: 570 ml of beer, 200 ml of wine or 60 ml of spirit, each containing about 20 g of alcohol;

10. Those who have been unable to take the test drug in the past or have intolerable adverse reactions;

11. Those who used drugs to improve or affect sperm concentration or motility 1 month before screening;

12. Those who have participated in other clinical trials within 3 months before screening;

13. According to the judgment of the investigator, there are other persons who are not suitable to participate in this clinical trial.