You're booking a hotel in Shanghai. You notice the elevator jumps from floor 3 to floor 5. No 4th floor. In the parking garage, spaces skipping the number 4 entirely. On luxury car license plates, the digit 4 is nowhere in sight.
This isn't a coincidence. In China (and much of East Asia), the number 4 is considered deeply unlucky — so unlucky that avoiding it has a name: tetraphobia.
It's All in the Sound
The reason is simple: 4 sounds like death.
In Mandarin, the word for four is sì (四). The word for death is sǐ (死). They're not identical — they have different tones — but they're close enough to make people uncomfortable.
In Cantonese (spoken in Hong Kong, Guangdong, and by much of the Chinese diaspora), the similarity is even stronger. The Cantonese word for four (sei) sounds almost identical to the word for death (sei).
That sonic overlap is enough to embed deep unease in a culture already attuned to symbolism and omens.
How Far Does It Go?
The avoidance of 4 runs surprisingly deep in everyday Chinese life:
- Buildings: Many Chinese high-rises skip floors 4, 14, 24, 34, and anything with 4. Some skip all floors in the 40s.
- Phone numbers: Having a 4 in your phone number (especially multiple 4s) can reduce its resale value significantly.
- License plates: Premium Chinese license plates avoid 4; plates with multiple 4s sell for far less than those with 8s.
- Hospital rooms: Room 4 and ward 4 are sometimes avoided.
- Gifts: Never give someone four of anything — four flowers, four chocolates. It signals death.
- Addresses: A house or apartment numbered 4 can be harder to sell in Chinese-majority markets.
The Flip Side: Lucky Numbers
Understanding 4's unluckiness makes more sense alongside Chinese lucky numbers:
- 8 (bā, 八) sounds like fā (发), meaning to prosper or get rich. It's extremely auspicious. The 2008 Beijing Olympics famously opened at 8:08 PM on 08/08/2008.
- 6 (liù, 六) sounds like liù (流), associated with smooth flow and good fortune.
- 9 (jiǔ, 九) sounds like jiǔ (久), meaning long-lasting — auspicious for relationships and longevity.
Is It Changing?
Younger, urban Chinese people are increasingly skeptical of these superstitions — but even the skeptics often avoid 4 out of habit or to avoid making elders uncomfortable.
In real estate markets (where feng shui and numerology still carry serious weight), the superstition remains economically real. A 4th-floor apartment in a Chinese-majority city genuinely costs less. That makes tetraphobia not just a cultural belief, but a market force.
The Bottom Line
The unluckiness of 4 in Chinese culture comes from one thing: it sounds like death. That's enough. In a culture where language, symbolism, and omens are taken seriously, a sonic coincidence became a civilization-wide superstition — one that reshapes architecture, commerce, and daily life.
Next time you're in a Chinese building and notice the missing 4th floor — now you know why.