Yes it appears to reference the ecliptic, much appreciated.



Redrobes
Not seen that before !

Something to do with Chinese Zodiac
https://www.yourchineseastrology.com...olar-terms.htm
https://en.wikipedia.org/wiki/Solar_term

But I am not aware of why the line is positioned where it is. But I am sure someone with more local knowledge will let us know.
Your link to the Chinese Zodiac correlates with the inscriptions along the line. and the globe I see was made in China so that is very likely the reason