What is the cut-off point around China AD?

The demarcation point around A.D. began during the reign of Emperor Liu Kan of the Western Han Dynasty. The year after BC 1 year is AD 1 year, which is the first year of AD. There is no zero year in AD. For example, 20 19 years is 20 19 years from the first year of AD.

Before the founding of New China, China still used the traditional calendar-lunar calendar, also known as lunar calendar, ancient calendar, Han calendar, yellow calendar and summer calendar. After the founding of New China, in order to connect with the world, China began to use the Gregorian calendar as its own calendar and calendar.

Extended data

Every decade is called a "decade", such as two years in the 1920s and nine years in the 1990s. But the first twenty years of every hundred years are generally not called "ten years" but the beginning of a century. Every hundred years is called a century, but the first century BC and the first century BC are 99 years, that is, the first year of AD ~ 99 is the first century, the second century is 100 ~ 199, and the first century BC is 99 ~ 1, and so on.

Most countries in the world have adopted the AD chronology method, and China has adopted the AD chronology method since the establishment of 1949 People's Republic of China (PRC).