一些实用的个人工具。A collection of practical personal tools.
记录每一天的境外停留，查看累计天数和日历。Track days spent abroad and review totals and calendar history.
对比中国银行与招商银行的港币现汇卖出价，查看每日走势。Compare daily HKD selling rates from Bank of China and China Merchants Bank.
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