Hello, I am an American green card holder. Every time I go through the customs, I will write ARC on my passport. But this time, what about the LPR and numbers I wrote?

This is the identification seal of the US Immigration Customs for green card holders, ARC is the abbreviation of Alien Reges Presentation Card, and the foreigner registration card is also called green card, which is the green card. The first two years are usually covered in this way, because the green card stipulates that you can't leave the United States for three months every year for at least two years. LPR is the abbreviation of legal permanent resident, that is, legal permanent resident, also called green card holder, green card holder. With this, you can leave and enter at any time without special restrictions. You are generally required to enter the United States once every four years and stay for one month.