Knowing numbers is important. Different numbers have different meanings.
Some numbers have positive meanings. Other numbers have negative meanings.
Let me tell you about this:
Two= Er= stupid
Three= San= sad
Four= Si= death
Five= Wu= toilet
Six= Leo= smooth, all goes well
Seven= Qi= family relations or you can succeed
Eight= Ba= win money
Nine= Jiu= long life
Many numbers have meanings for instance
250= Er bai wu= stupid
520= wu er ling= I love you
3166= San yi liu liu= sayonara= Good bye in Japanese
88= ba ba= bai bai= Good bye
Chinese people mind numbers a lot.
For instance good phone numbers sell at high price!
Numbers have meaning according to phonetics. I told you about 2013-1-4= er ling yi san yi si= ai ni yi shen yi si= I love you forever.
A few numbers have meaning related to believes, same as 13 for western people.