To the Chinese, 8 is an auspicious number.
八 8 팔
In 2008, Chateau Lafite Rothschild added the Chinese character 八 to their bottles, and it immediately became popular in China because giving the gift of wine not only symbolized sophistication and luxury, but also was the message of good luck.
To me, the Chinese number 8 八 looks similar to person 人. With just 2 strokes, it is one of the easier hanja to remember.