How did Shenzhen, with a population of more than 654.38+07.6 million, keep the epidemic from spilling over?

How did Shenzhen, with a population of more than 654.38+07.6 million, keep the epidemic from spilling over? Still benefited from strict control.

Let's first popularize the difference between health code and travel code. Every place gives different names of health codes. Guangdong calls it Health Code Yuekang Code, Jiangsu calls it Health Code Su Kang Code, Hubei calls it Hubei Office, and Henan calls it Yu Hui Office. These are all the same. These names may be different, but they are all used to query the health code, because the development software of each province and city is different, but they are basically named after the abbreviations of the sub-provinces and cities. All health codes have only three colors, namely, red team (confirmer), yellow code (close contact or suspicious personnel and personnel in medium and high risk areas) and green code (healthy personnel). So in this respect, if the health code is red, it is basically a person in a diagnosis or high-risk area.

Second? : What's the difference between travel codes? .

Travel code has only one color, that is, green. Travel code only calculates whether you arrive in a country or region within 14 days and 4 hours. This situation will only remind tourists of their travel situation through the travel code, which has nothing to do with health.

In addition, there will be a * sign on it. * The sign indicates that there is a medium-high risk area in the city, but it does not directly indicate that the person has been to the area, because the mobile phone base station will collect your signal. Even if your travel time exceeds the standard, your travel card will display the * sign, such as some high-speed driving and train driving. As long as the mobile phone base station has your signal number, it will be clearly marked on your travel card, which is also convenient for you to accurately judge your destination. Generally speaking, in this case, you will directly register the information, and then do nucleic acid detection and separation measures. Because I am unfortunate, that's it, so the health code and travel code are very important. Please protect yourself and try not to run around, or you will be influenced by yourself. If you don't do it well, you will be isolated and bear the expenses yourself. This is blood loss.