With application code is a good application. As an entry, to verify some of the state party through a URL, the application can be considered a block chain technology of it. Block chain is not here to do too much explanation. But the basis of the principle, is to bind with the application code and the user, then do a one-man a yard, while in the background there should be a database, a detailed record of the details of this person's behavior, understand, epidemic prevention here is only a small part of the application.
After that, there will be more content and application code associated with the formation of the fact that the accumulation of individual behavior, when and where you went, what matter done, after accumulation, the formation of many irreversible behavior of the track is the fact that, when the time you do things and you say to be true ah. Otherwise, you can check it out when a oh.
Another key thing is do not lose the phone, this matter is very important. If the phone is lost, immediately CIM card, go to the appropriate service providers (Mobile / Unicom / Netcom / Telecom) here reported missing to close out, or really very serious consequences.
But this phone is outrageous after all worldly possessions, and the code after all, not one, but only one logical. Think heels for careless people can be, for people interested in the case, to guard against really difficult.
With application code that can be read by a professional device identification bar code recognition software, and out of the two-dimensional code, the contents inside a URL link;
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