There are three ways to express a range or numbers or dates in Chinese:
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到 (dào), which means “to” or “until”, is commonly used for number ranges, for example一 到 二 天 (yī dào èrtiān) means “one to two days”, or “a day or two”. You can use到 when other ranges such as months, for example “January to March”一 月 到 三 月 (yī yuè dào sān yuè) - A hyphen (a dash) [-] can be used in the same way that we do in English, for example
4 - 5 天 (sì – wǔ tiān) means four to five days. In Chinese a hyphen is called连 字 号 (lián zìhao), however when saying a range you would say到 (dào), so4 - 5 天 would be said as (sì dào wǔ tiān). - A tilde “wavy line” character [~] may also be used to represent a range, so
4 - 5 天 (sì ~ wǔ tiān) is also acceptable and in fact common when the range is an estimate. The Chinese word for a wilde “wavy line” is波 浪 号 (bōlàng hào) and again, when verbally talking about a range you would say到 e.g.4 ~ 5 天 would be said as (sì dào wǔ tiān).