What does space-time companion mean? This question is so profound that there is no accurate 100% answer. Everything is not unique. There is nothing absolute in the universe. Everyone has two sides, absolute right and absolute wrong. There is no such thing in the world. The law is also corrected from time to time. In particular, more than 50 states in the United States have their own laws. Laws committed in this state are not illegal but legal in that state. Space-time companion can also be understood as time is time, emptiness is space, companionship is companionship, companionship is following, and people represent someone. Space-time companion means that people are accompanied by time and space, that is to say, someone is accompanied by time in a certain space, there is no light, no door, no time in a cave, no time in a vast space, only you are accompanied by space, only you are accompanied by a black hole. What is space, the earth, the sun, the moon, stars and people are all marks and names given by human beings. Space is always changing. The sun, the moon and the stars, the mountains, rivers, flowers, trees, animals and people on the earth, and the continental plates on the earth are all changing and moving. In the universe, people know little about the East, but only speculate and predict. There is no absolute circle or absolute straight thing in the universe. Some scientists say that this law and that law may be denied in a few years, decades or hundreds of years. The scientific theory of human evolution is not very accurate, but a natural law. It is impossible to say when the universe will change at any time, and people don't know whether it exists yet.
Space-time safety distance is 800 meters. Spatio-temporal adjoint means staying in the same spatio-temporal grid (the range is 800 m * 800 m) * * for more than 10 minute, and any number stays for more than 30 hours in the last 14 days, and the number found is the spatio-temporal adjoint number. For example, the infected person has been to a certain place within 14 days, and the trajectory of you 14 days intersects with him. Whether it is a physical passing or a drift in communication signals, it may be considered as a "time companion." In addition, in some areas, the definition of time-space companion has not been clearly put forward, but it has been implemented in actual management.
Space-time companion is a word invented by Chengdu Public Security Bureau and Municipal Center for Disease Control and Prevention, which is a name for users who may have contact with confirmed patients. Time-space companion refers to a time-space companion whose itinerary shows that the user and the confirmed user are in the same range for more than 10 minutes in a certain period of time, and one person from both sides stays in the area for more than 30 hours during this period.