Thats what Americans said in 1950 before they killed 53,000 of them. Most of those casualties were from the initial attack which caught Americans by surprise - as usual. The South Koreans are sure worried. China has 6,000 nukes pointed at Taiwan, not sure how many at S. Korea but I'm sure it's more than 6,000.
More like 38K, and except for Task Force Smith, which was hammered by NK troops around Osan, I'd guess that the bulk of our casualties occured after China entered the war in November(?) of 1950.