Chinese tip: “一” means one in Chinese. It is often the first Chinese character we learn as a kid. But do we really know how to read this? Do you read “一” in the first, second, third or fourth tone?
There are three ways to read “一”: “衣”（一声）、“移”（二声）和“义”（四声）。
1) If you are using “一” to express chronological order, it is read“衣”，for example: 一二三四，第一天，第一名，第一组，第一个
2) If “一” is part of a two-character word, its pronunciation depends on the second character. If the second character is in the fourth tone, then “一” is read “（二声）移”, for example：一定、一样、一件、一套、一辆、一部
3) Otherwise, in all other scenarios where “一” is part of a two-character word, “一” is read “（四声）义”, for example：一分、一艘、一天、一只一人、一条、一元，一组、一比、一览、一把……