I have an American green card. I applied for my wife to immigrate to the United States, and there has been no news. How to check the progress online?

One is that you write to the immigration office to ask. The other is the email you left at the beginning. Use this email to make an inquiry.

There are also inquiries in official website Immigration Bureau. This query is where you say "receipt number". The number entered is not your green card number, but after you mailed the application materials to the Immigration Bureau, the Immigration Bureau wrote you a letter. Said your application was accepted, and then gave you a number, you can check it.

According to the application, the waiting time for green card application is at least 20 months. If the schedule is approaching or has exceeded without notice, check it. Usually you ask before the scheduled time. I don't recommend you to do this, it will offend the immigration department.