So his traps have springs to let them stretch, their wires are covered with a protective layer to avoid causing discomfort to the birds 'feet, and the foot snares are deliberately loose so it is quite easy for the birds to slip out of them.
陷阱上有伸縮彈簧，鋼絲上有保護膜，怕鳥爪不舒服，套環還留有空隙，也因此鳥兒很容易滑脫，被獵人譏笑：如此怎可能抓得到鳥？