看看维基百科咋写的吧，要不然这帮白奴老中不相信：
“While the phrase itself is innocuous, its use in contemporary times has
caused controversy in the United States due to it including "chink", a word
that can also be used as an ethnic slur to refer to someone of Chinese
descent.[4]” https://en.wikipedia.org/wiki/Chink_in_one%27s_armor
