On the tea plantations there are plenty of ideas for trapping harmful insects. For example, here in Hangzhou, they place little panels covered in glue everywhere among the tea plants. The fluorescent yellow of the boards attracts the insects, but most of all it is the pheromones in which they are coated that appeals so much to bugs.
These are clearly unrelated to all the election boards that are flourishing, right up until this weekend, all around our voting stations.