Author: David Zhang

  • Everything About Quick & Easy Haircut

    Everything About Quick & Easy Haircut

    Professional barbers do good haircuts because they have talent and have years of practice. For an average amateur to compensate for the lack of experience, then it becomes critical to have proper tools to guard against mistakes and to speed up your learning. In this video we introduce 13 special tools, some of which are…

  • Smallest Probability of Infection During or After a Shopping Trip

    Smallest Probability of Infection During or After a Shopping Trip

    When you go out shopping or bring in things you have purchased after your trip, have you investigated every step so that you have the lowest probability of picking up invisible germs? Here we will share with you things we do to minimize the risks. Depending on your own situation, you should examine your process…

  • All Different Mask Testing Methods at Home

    All Different Mask Testing Methods at Home

    https://youtu.be/8mCPB8n065Y When you test filter materials at home, you may have different particles available to you to use or different equipment to detect the particles. Therefore one method may not suit all your needs. In this video I am going to show you 3 levels of particle filtering tests I have invented for your face…

  • Custom, Tightly Fit DIY Mask With Easy Filter Replacement In 3 Seconds

    Custom, Tightly Fit DIY Mask With Easy Filter Replacement In 3 Seconds

    Is your face mask effective? How do you test the quality of your mask, especially your own DIY masks?

  • How Effective Is Your DIY Face Mask? Easy Home Test

    How Effective Is Your DIY Face Mask? Easy Home Test

    https://youtu.be/25lDoBSsQG8 Is your face mask effective? How do you test the quality of your mask, especially your own DIY masks? Avoiding this question is unsafe and you cheat your own health. This is increasingly important when the experts are changing their strategies and asking healthy people to wear masks. You may think you don’t own…