This is at a site called "Calendars Through the Ages".

Chinese Calendar: http://webexhibits.org/calendars/calendar-chinese.html

They don't know how far back the Chinese calendar dates, but definitely back to the times covered in our group here. Supporting evidence dating back to the Shang Dynasty have been uncovered. "Evidence from the Shang oracle bone inscriptions shows that at least by the 14th century BC the Shang Chinese had established the solar year at 365 1/4 days and lunation at 29 1/2 days."

Topics at this website:

What Does the Chinese Year Look Like?
What Years Are Leap Years?
How Does One Count Years?
What Is the Current Year in the Chinese Calendar?
What about the year 2033?
What was the early Chinese calendar?
Details of early calendars
When were foreign calendars introduced?

Welcome to the oncoming Year of the Dog!