In China, people are superstitious and picky with numbers. There are two main unlucky numbers; 4 and 13.

4 is romanized (pinyin) as si, which shares the same romanization as the word death. 13 is unlucky, just like in the west.

Chinese people are very careful about numbers. In this apartment building, there are supposed to be 30 floors. However, the floors 4, 13, 14 and 24 are skipped, leaving only 26 floors. Another example is with phone numbers, people avoid the number 4 in them and try to get as many 8 as possible. 8 is romanized as ba, which rhymes with fa, meaning richen in Chinese.