How about installing security doors?

Whatever you do, you must have perseverance, just like installing a door. The most important thing about the job of installing a door is to have a good eye. There is no technical content, but it is very hard! Another thing about Anmen is that you need to have a strong understanding, because it will involve maintenance. Don't underestimate him when it comes to security door maintenance. I have been doing it for 5 years, and I still encounter difficult problems to solve. In fact, when we do something, if the first thing we think about is whether it is easy to do, then I advise you that it is best not to do it. It will be far from your ideal, including anything. This is a matter of attitude!