Approval Letter for Over 21 Year son

[honeysingh1234]

Hi there,

I have received a notice of action I-797 stating that my petition has approved and my case no will be forward to NVC. it's for the permanent resident filing for his son over 21 years old. i would like to know what will happen since i received that notice around 5 months ago and didn't receive anything else after that.it's be around 5 and half year since the case was applied. Thanks