While there's not much you can do as an individual to make public places safer, you can work to make your house more impenetrable to intruders. These measures can help prevent the need to ever have to hide from a murderer in your home.  Make sure your doors and your door jambs are made of sturdy steel. If you have glass inserts in or around any of your doors, make sure they cannot be broken. Keep windows closed and locked at night and when you are not in the room. Make sure your home is well-lit at night to deter intruders. Alarm systems can provide excellent security and peace of mind for people at home. They can automatically call for help if someone breaks into your home, and they often scare intruders off.  Some alarm systems have panic modes that you can use to make the intruder think you have turned the system off, but secretly contact the police. Ask the company that provides your monitoring services how you can alert them to dangers if there is an intruder in the home. In some cases, you may provide them with a panic word, and in others, simply providing the incorrect password will trigger a response. You may want to invest in security cameras as well. Whether you have an alarm system or not, put up stickers that say you do. This often deters criminals just as much as an actual alarm. It's a good idea to have a designated safe room in your house and to make sure that the entire family knows that this is where you will hide in the case of an emergency.  The safe room should have a sturdy door and a strong lock on the inside. You can have a special steel security door installed for extra protection. Make sure the room is somewhere that will be accessible to your family and far from the areas where an intruder is most likely to enter your home. A closet or bathroom near the bedrooms is a good choice. In addition to designating a specific room in your house as your safe room and making sure that the area is secure, it's also a good idea to stock the area with the supplies you will need in the event that a...

TL;DR in Chinese:
锁好门窗。 安装警报系统。 在家里准备一个安全房间。 将重要的物品放在安全房间中。