Is this an 'armed to the teeth' reference?
https://www.reddit.com/r/aikido/comments/1rlrllc/video_morihei_ueshiba_in_budo_1935_demonstrates/
Al Jazeera
‘As close as lips and teeth’: The highs and lows of China-North Korea ties
Chinese President Xi has been welcomed in Pyongyang for his first visit since 2019.