1. Fujian prunes may not have been sprayed with pesticides during the growing process, or other control measures, such as biological control, etc., which makes the prunes free of worms.
2. It is possible that the prunes have been rigorously screened and cleaned after picking to remove the bugs attached to the fruit.
3. It is also possible that the prunes were not damaged during transportation, maintaining their integrity and cleanliness, thus avoiding the invasion of bugs.
All in all, the reasons why there are no bugs in Fujian prunes may be manifold. Whichever the reason is, it ensures that consumers can enjoy healthy and tasty prunes.