In order to offset further the costs of production, Long-long Monthly also includes advertisements, an element which has not escaped the notice of its youthful audience.
後來有其他小讀者知道了這回事，也紛紛來信索取，陳煌因此十分懊悔過去沒有集郵的習慣。結果是他想了個好辦法：鼓勵這些集郵的小讀者通信，交換郵票或交換集郵心得。不低估孩子，他們也因此會發展得更好