The three lower-valued stamps were suitable for then current mailing costs. But the one yuan and the five yuan were of unprecedented high values, and were in preparation for initiating package delivery and remittance services.
前三種低面額郵票合於當時的郵資，而壹圓、伍圓是前所未見的高額郵票，則是為創辦包裹與匯票業務做準備。