I spent five years in China. I am no longer expecting to return.  While it seems like barriers to travel – these and a hundred signs say that the country is turning inwards, preparing for some other surprise – will keep casual travellers away for another two years, something more has been broken in me and people like me. One of the strangest inflections of the pandemic for me has been to realize that the virus, however it became a world-plague, likely came from a rainforest in which I briefly stayed. The Mojiang mine, whatever its place in the calamity, was just a few kilometres from where I was working.  Flashing images of the biology…