In fact, this problem is in the problem section of EVUS information network. We have answered similar questions more than once, probably in a relatively backward position, and many netizens have not seen them.
The answer to this question is: EVUS does not need to be updated every two years. If it is not renewed, the ten-year American visa will not be invalidated. Only when the visa expires (or other special problems lead to the invalidation of the visa, which will not be discussed here) will the visa expire. Failure to update EVUS will not invalidate the visa!
As for this two-year period, it means that after you successfully register (renew) EVUS, it is generally valid for two years, that is, you can go to the United States without having to register again within two years. However, it should be noted that if your passport is valid for less than two and a half years, then the registration period is less than two years, and the validity period only lasts for the first half of the passport. Because the passport is invalid for half a year and you can't leave the country for the United States, this visa renewal is also set up in this way.
The simplest and most direct answer is: if you have a 10 American visa, you don't need to register for EVUS if you don't want to go to the United States, but you must register if you want to go. Registration is valid for 2 years (depending on the validity of your passport and visa), and you don't need to register again within 2 years. You don't have to register if you don't go to America after two years. Of course, there is no charge in official website now. You can register without going to America.
I hope the above answers can help those in need. Similarly, if you have any other questions about visa or EVUS registration, you can ask questions on our EVUS information network or call our consultant at 13922482329 (WeChat with the same number).