It was an eastward trend that established Confucianism.
Step-by-step explanation:
The establishment of Confucianism was happening to the east.
At first it happened in India that the groundwork was laid in terms of being inspired by Buddhist thinking.
Then it reached its current form in China.
From there on it was taken up by the Koreans, Japanese and others in the far east too
One difference in here is the fact that this also reached other places in the west of China through the silk road and traveled through it, albeit without much success as an idea.