The domain name, 1112-8999, comes from one winning hand of mahjong game, called Nine Gates. In Chinese, it is called

The hand Nine Gates contains (could be any suit of bamboo or dot or character) 3 tiles of number 1, one tile of each number from 2 to 8, 3 tiles of number 9. That is 1112-8999. Below is an example of the Nine Gates hand:

This hand wins with any of the 9 tiles of the suit. That is why it is called Nine Gates. Nine Games is one of the biggest hand of many mahjong games.

This is why We choose the domain name 1112-8999.