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Corporate News
2022-12-07
850

How to protect yourself in the future? The most comprehensive epidemic prevention strategy →

From May 5, Beijing Metro will not refuse passengers without a 48 hour nucleic acid negative certificate to take the bus
Corporate News
2022-11-30
866

If the harmful gas exceeds the standard, it is easy to cause many diseases. How does the fresh air system work?

With the development of economic conditions, the number of newly built houses in China in recent years is staggering
Corporate News
2022-11-29
881

Popular science on epidemic prevention and control in autumn and winter: frequent ventilation and pay attention!

In autumn and winter, it is necessary to open windows for ventilation