The adjusted median salary in the US is $74,580.
According to BLS's July 18 2023 release, median weekly earnings for full-time workers is $1,100. after seasonal adjustments, it is $1,107. For Hispanics, it is $893. By industry, it is $707 for service occupations.
That means a median earning of
$57,200, $46,436, and $36,764 respectively.
For part-time workers, the median weekly earnings is
$358 total, and $351 for Hispanics. That is $18,616/$18,252 if they were able to get that for the whole year.
The Federal Reserve estimated the informal sector is about 3% of US GDP and employs 5% of the workforce. Due to lack of money, that number may have risen, but these are described as necessary supplemental income and not more than their formal income. From BLS, service occupations are 9% of the workforce. Those numbers don't square with illegal workers having, in general, high pay. Sure there might be a few, but those are exceptions and not the general trend. Not something a prospective Chinese illegal can count on at all.
According to the World Bank, China's PPP conversion factor is 3.99 for 2022.
That means those same US annual wages would be the rough equivalent of:
104.5k, 84.8k, 67k RMB for full-time workers
34k, 33.3k RMB for part-time workers
Just for 104.5k RMB, that is 87.9k RMB and 72.1k RMB post-taxes for Residents and non-Residents of Shenzhen respectively (per tax calculators).
Yea people are really going from China to the USA as illegals and then becoming fabulously wealthy.