I know several foreigners, Americans, married to Chinese women who have been refused visa extensions and they had to go back to the USA.
They have wives they can't visit and houses in China they can't live in. No reason was given for the visa refusals and does not need to be.

Sounds extremely far-fetched to me! If indeed so, why haven't any of those forcibly estranged Americans posted about such unfair treatment at the hands of Chinese Immigration online?