How long the urine is left to be tested is related to the season, usually not more than two hours if it is in the summer months and the weather is hotter. If it is winter, it is recommended not to exceed four hours. It is best to send the test within half an hour. In the summer, when the weather is hot, the urine specimen should not be left for more than two hours. Due to the temperature, the components in the urine deteriorate faster and bacteria multiply more, so they need to be sent to the hospital for testing in time. But the weather in winter is relatively cold, the urine specimen can be placed for a relatively longer time. It needs to be controlled within four hours to avoid placing it for too long, otherwise it may affect the test results. It should be noted that if you need to carry out clinical urine routine testing, it is recommended to take morning urine in half an hour to an hour or so for testing, to avoid affecting the detection index, resulting in misjudgment and other situations.