If you are older, or know a lot about 20th century history.. the sunrays signify the flag of "The Greater East Asia Co Propserity Sphere" - yes, the Imperial Japanese Army.

NOT a good thing to be emulating. This flag STILL represents MILITANT nationalism in Japan, as well as the Japanese version of Holocaust denial.

It also makes Chinese people get VERY angry because of the STILL LARGELY UNRESOLVED issues related to the mass murder of millions of Chinese in some of the most terrible atrocities known to have ever occurred.. (like the slaughter - BY HAND of ~300,000 Chinese, mostly women, children, infants and old people, in Nanjing, over just a few days, a slaughter that shocked even the Nazis who were there.)

However, younger folk in the US see those kinds of designs as a 60'ish kind of thing, comparing them with the posters of the great artists of that era..

:o