Another poster said ships that would normally take empty containers back to China are now just unloading and leaving empty. If that's the case, it seems like it's trading short term gain for a longer term problem. Make them take the empties?
Nobody has to "make" anyone do anything in that situation. It's a classic supply/demand imbalance. Governments can't do anything here - even just getting them to pay attention to their own zoning rules required some random CEO in a boat talking to local workers then posting on Twitter. They aren't in a position to do anything better than the workers themselves can do.
