How to open the stool tube of health certificate

Unscrew the cover of the excrement collecting pipe, there will be a long handle on the inside of the cover, and there is a groove in the head of the handle, and about 5 grams of excrement will be collected with the excavated part. Health certificate refers to the proof of preventive health examination, which proves that the examinee has the health quality to engage in the prescribed business. Health certificate mainly involves six diseases in five industries, which largely protects the health of employees and clients.