opportunely / coincidentally / as it happens / skillful / timely
巧
=
丂
+
工
:
The Queen of Hearts (qi) arrived just at the right time (巧) in the aorta (ao3). When she arrived a big chocolate (巧) house, reinforced using steel beams (工), was about to melt and collapse. Just at the right time the Queen of Hearts put a huge breathing mask (丂) under the collapsing structure to collect the chocolate, filter it with the mask and reuse it.