IDK why you're being downvoted, you're totally right. For this to be closer to a fair comparison, we'd need to know the averages for both countries over the same time period.

Let's make the last 40 years our time window. China has dropped zero bombs in that period, making their average zero bombs dropped per day.

Now for the US, they've certainly dropped some bombs in the last 40 years. So that would make their average... Greater than zero bombs dropped per day... Oh...

[–] PolandIsAStateOfMind@lemmy.ml 6 points 6 hours ago* (last edited 6 hours ago)

If we take that back to let's say 1949 when PRC was founded (to have the most timeframe possible) it would look even worse for USA because China still didn't dropped much more bombs in that period but for USA it would include Korea, Vietnam, Laos and Cambodia - 4 worst and most intensive aerial terror campaigns in history.