In Dumb Americans, Yaxue Cao explains how some valued American character traits and ideals appear to many Chinese:
“he had spent a significant portion of his formative years in the US. But instead of shaping his values, America was this wonderful place filled with dumb people for him to take advantage of! And he is by no means a singularity among Chinese living in America.
“To many Chinese, Americans don’t have xīn-yǎn (心眼, meaning, literally, eyes of the mind; or figuratively, calculating, wily), they trust what you say, and they believe you are doing what you say you are doing. For that, they are dumb.
“To many Chinese, the guilelessness on a face, the heartiness of a voice, or/and the confidence with which a person carries herself/himself can all seem rather shǎ (傻，foolish, simple-minded).” [Link: Dumb Americans]