1, century pinyin: shějě Basic explanation: the unit for calculating the year, and one hundred years is a century. This word comes from Latin, and a century is a hundred years, which usually means a hundred years in a row. When used to calculate the date, the century usually starts from the year divisible by 100 or the year after that;

2. For example, 2000 or 200 1 year. This odd-numbered chronology comes from the post-Jesus era, where 1 usually means "yearofourlord", so in the first century it was from 1 to 100, and in the 20th century it was from 190 1 to 2000, so it was 2000. However, in the past, someone defined 1 century as 99 years, and now the century is 100 years. According to this definition, 2000 is the first year of 2 1 century.