There are three ways to express a range or numbers or dates in Chinese:
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), so 4 - 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).