[chx]

Extremely heavy citation needed for Confucianism spreading across the Silk Road. As far as I am aware it just didn't happen.

Also, the Analects use a very different version of the Golden Rule, much more a prohibition than a moral standard: what you do not wish for yourself, do not do to others. But roughly around the same time Egypt and Greece also had this thought recorded and it's somewhat hard to believe this was due Confucianism spreading like wildfire. Thales used this in ~624-546 where Analects is later than that.