There was another sort of "special delivery" message encoded into the broadcast. Four-digit numbers representing Chinese characters were broadcast to ROC intelligence agents behind enemy lines.
另一類「特約通信」更特別，工作人員在節目裡以 4 個數字為一組，一組一組的播報，每組數字代表一個字，傳送給我國派駐在大陸的敵後情報人員。