Chinese numerology
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Some numbers are believed by some to be auspicious or lucky or inauspicious or unlucky based on the Chinese word that the number sounds similar to. The numbers 6 and 8 are widely considered to be luck
Numbers 4, 13 and 14 are omitted in some Chinese buildings.
"Double happiness" ring design
Official Las Vegas Light Bulb #88 from 08-08-08
Tetraphobia
Videos
Tetraphobia is the practice of avoiding instances of the digit number 4. It is a superstition most common in East Asian nations and is associated with death.
An elevator control panel in a residential apartment building in Shanghai with no floor numbered as the 4th
The number 4 missing in a parking lot in Japan
Phone numbers for sale in Hong Kong. Note the many fours.
4th floor labelled "F", 13th floor labelled as usual