I definitely appreciate that a percentage of so called "employees" are actually just full fledged Chinese nationals, living permanently in China, paid a salary to pretend to be an American who had their identity stolen.
But there absolutely is also a non-negligible number of Chinese and Indian nationals, who have some type of visa status in the US (especially a green card) who spend many months in their original countries making $200,000 or more per year while living like royalty in their home countries :)
If you get a green card and leave the us for any amount of time, on return the border agent makes a determination on the spot if you intended to live abroad.
Less than six months is simply less suspicious than more.
And what are you supposed to do if they make a determination against you, return to your passport holding country and hire a lawyer?
If the answer is yes, well then it is yet more proof that the US immigration system operates basically extrajudicially just like the IRS and ATF, and only occassionally do the courts pull them back in after much hardship for the plantiff.
Words and policies are supposed to have meaning, and I doubt we'll get any charts or graphs on border refusals per amount of time spent abroad for GC holders.
It’s good to know the boss.