In mainland China, foresters tried cutting wide buffer zones around areas of diseased pine forest in the hope that the pine sawyer beetles would not be able to fly across them, but the beetles advanced inland just the same.
大陸則在生病的松林外砍出緩衝帶，希望隔絕天牛飛越，天牛卻橫跨沿海省份，直往內陸進逼。