The weather becomes warmer, insects, after all, spring came true. Saying "spring", spring, is the foundation of plant growth season, while those trees, erosion hazard of the earth "lung" hundred foot gradually becomes active worm. Hence, rev yuan primary woodpecker association classmates in LiJingYi under the guidance of teachers, began their trip to the trees, they hope that through this action to eliminate pests, as earth more better environment by their meagre strength.