This poor record is due to the fact that the criminals responsible for these crimes exploit the use of stolen cell phones or pre-paid call cards, or repeatedly call-forward to a series of numbers to avoid being tracked down. They may even transfer a call to a number in China, foiling any attempt to zero in on them.
主要是此類詐騙歹徒，巧妙利用王八機、易付卡或電話重重轉接避開追蹤，甚至將電話轉接到海峽對岸，使得追緝行動被迫斷線。