Have any questions about the code?

[Sentence99]

Hello dear author! Thank you for sharing the code, but I have a few questions about the code?
1: There are a lot of commented out lines of code in the model section, I wonder if these are useful?
2: There are many options in the code return part. What do reconstruction1, reconstruction2, and recover represent and what are their uses?
I look forward to the author's answer, and I would like to express my gratitude!