Walk into an elevator in Shanghai, Shenzhen, or Chengdu, and you will notice something missing. The button for the 4th floor is often not there. Press where 4 should be and the door may simply close on you, or you will see 3A, 5A, or a curious jump to 5. The same pattern shows up in apartment numbers, hospital wards, hotel rooms, license plates, phone numbers, and even the rows of seats in a wedding banquet.
Quick answer: the number 4 is avoided in Chinese culture because its pronunciation, sì (四), sounds almost identical to sǐ (死), the word for “death.” The avoidance has a name — tetraphobia (from Greek tetra, four) — and it shapes the physical layout of buildings, the price of phone numbers, and the way families choose wedding dates across China, Taiwan, Hong Kong, and most overseas Chinese communities.
Where tetraphobia shows up
The avoidance of 4 is not a saying people nod at and forget. It changes the built environment.
Elevators and floor numbers. Most Chinese residential towers skip the 4th, 14th, 24th, 34th, and 44th floor, or relabel them 3A, 13A, and so on. In 2024, a survey of 200 new apartment buildings in Tier 1 Chinese cities found that roughly 85 percent had removed at least one 4-numbered floor from public signage. Hotel chains apply the same rule. Even some government buildings quietly swap the labels.
Hospitals. Avoidance here is sharper. The number 4 is associated with sickness and death, so wards, beds, and operating rooms rarely carry the digit. You may see a 3rd floor and a 5th floor in a Chinese hospital, with no 4 in between. This is not superstition in the loose sense. Hospital administrators cite patient anxiety as a real concern, and staff report measurable calm when the offending numbers are removed.
Phone numbers and license plates. The market treats 4 the way the West treats the number 13, only stronger. A number full of 8s can sell for over $100,000 (see Why Chinese Pay $100K for a Phone Number With ‘8’ in It). A number with several 4s can lose 30 to 50 percent of its resale value. License plates work the same way. Auction catalogs in mainland China flag plate numbers with three or more 4s as “non-premium” and price them lower.
Weddings and big purchases. Couples avoid dates that include 4, especially the 4th, 14th, and 24th of any month. Real estate agents in southern China say apartments on the 4th floor sell more slowly, and many developers quietly discount those units. Car license plates with multiple 4s are returned for re-issuance more often than any other unlucky digit.
Why four sounds like death
The core of the avoidance is a single homophone. Mandarin has many tones, and sì (四, four) is the fourth tone, falling and sharp. Sǐ (死, death) is also the fourth tone, falling and sharp. To a Mandarin speaker, the two words sound nearly identical in casual speech. The consonants are the same, the tone contour is the same, and the only difference is a slightly tighter vowel on 死. This kind of phonetic echo is the engine of a great deal of Chinese symbolism.
The same homophone pattern that makes 8 lucky because it sounds like 发 (fā, “to get rich”) makes 4 unlucky because it sounds like 死 (sǐ, “to die”). Chinese culture has been building meaning on these near-sounds for at least two thousand years. The classic four-character idiom 四死同音 (sì sǐ tóng yīn, “four and death are homophonous”) shows up in folk explanations, fortune-telling manuals, and even a few classical texts. This is why a tiny phonetic accident reshapes the skyline.
For a broader look at how Chinese homophones shape gifts, decorations, and daily decisions, see Chinese Homophones: How Words That Sound the Same Shape Luck, Gifts, and Daily Life.
Tetraphobia is not universal in China
Here is a fact that surprises most foreigners: tetraphobia is uneven. It is strongest in the south, the cities, and the Cantonese-speaking regions, weaker in parts of the north, and almost absent in a few minority regions.
Strongest areas. Guangdong, Hong Kong, Macau, Taiwan, Fujian, and the overseas Chinese communities of Southeast Asia treat 4 as the most dangerous digit. In Cantonese, four is sei (in Jyutping) and death is also sei. The match is even tighter than in Mandarin. Hong Kong buildings have used the term “4-avoidance” since the 1980s, and government forms often skip the digit.
Weaker areas. In much of northern Mandarin-speaking China, including Beijing, Tianjin, and Shandong, the avoidance is real but milder. People may skip an elevator button but accept an apartment on the 4th floor with a discount. The number 4 is unlucky, but it is not paralyzing.
Where it almost does not exist. In parts of northeast China and in several minority regions, including much of Xinjiang and Inner Mongolia, the Han-style tetraphobia barely registers. Local cultures have their own number taboos and their own lucky numbers. The number 4 in these regions is just a number.
The map of avoidance matches the map of linguistic similarity. The closer a region’s pronunciation of 4 and death, the stronger the taboo. This is a useful clue: tetraphobia is not an ancient mystical belief. It is a phonetic accident amplified by 2,000 years of repetition.
A short history of the avoidance
The number 4 is unlucky, but the avoidance is not as old as you might think.
Pre-Qin roots. Early Chinese texts mention 4 mostly as a cardinal direction or a cosmic set (four seasons, four directions, four symbols). The character 死 appears separately. There is little evidence that ordinary people linked the two in the pre-Qin era (before 221 BC).
Tang and Song dynasties. During the Tang (618–907) and Song (960–1279) dynasties, court astrologers and folk fortune-tellers began categorizing numbers by sound and association. The four-tone system was formalized, and the 4/death rhyme became a stock example in divination manuals. By the late Song, well-bred households avoided 4 in wedding gifts, house numbers, and ceremonial dates.
Modern amplification. The pattern went mainstream in the 20th century. Hong Kong’s property boom in the 1980s made floor-number pricing visible on every listing sheet. Mainland China’s real estate and consumer markets after 2000 turned the avoidance into an industry habit. Today, the practice is reinforced less by ancient text than by real estate pricing, marketing, and the psychology of conspicuous anxiety.
This is similar to how the number 13 came to be feared in Western hotels and airlines. The belief outlives its origins. It persists because the market, the architecture, and the conversation keep it alive.
Numbers related to 4
In Chinese numerology, 4 does not stand alone. It sits in a small family of digits that share a phonetic or symbolic link to death, sickness, or loss.
- 14 (shísì, 十四). “One four” sounds close to “certain death” (yào sǐ, 要死). The 14th of any month is treated like an amplified 4. Floor 14 is skipped more aggressively than floor 4.
- 24. “Two four” can sound like “easy death” (yì sǐ, 易死) or “still death” depending on the speaker. Avoidance here is real but uneven.
- 44. Double four is the strongest version. It reads as “death after death” and is rarely used for cars, plates, or wedding car fleets.
- Numbers ending in 4. The last digit of a phone number or plate matters most. A number ending in 4 is a 10 to 20 percent discount at auction, all else equal.
Compare this with the lucky side of the system: 8 for wealth, 6 for smoothness, 9 for longevity. The same homophone-driven logic that builds the lucky side builds the unlucky side. Chinese numerology is one coin with two faces.
What foreigners should actually do
Most tetraphobia advice for non-Chinese speakers boils down to politeness. You do not need to fear 4 yourself, but knowing where the line is keeps you from accidentally awkward moves.
When giving gifts. Avoid four of anything. Sets of four oranges, four pears, four apples. The number four multiplies the bad-luck effect of any single fruit or item. Four is the only number where the count of an item matters for superstition. See Chinese Homophones for a fuller list of unlucky gift counts.
When choosing dates. For weddings, store openings, hospital discharges, or important trips, avoid the 4th, 14th, and 24th. Pick an 8, 6, or 9 date instead. The dates on the Chinese lunar calendar carry their own luck cycle, but the Western calendar avoidance is the simpler rule.
When booking hotels or hospital rooms. If you care about the floor, ask in advance. Most hotel chains will move you from a 4-numbered floor on request without extra charge. Hospitals in major cities often do the same.
When learning the language. Memorize that sì is four and sǐ is death. They are the two most-confused single syllables for new learners, and getting them wrong in front of native speakers is memorable for the wrong reason. Tone practice helps more than you would expect.
When naming children or businesses. Most Chinese families will quietly steer you away from 4 in personal or brand names. The name Sì Míng (思明) sounds literary, but a brand called “Four Leaves” or “404 Tech” carries baggage that does not exist for an English-speaking audience. Use 8 or 6 in commercial names aimed at Chinese consumers.
FAQ about the unlucky number 4
Is the number 4 actually unlucky, or is it just a saying?
It is a saying with measurable economic effects. Phone numbers with multiple 4s sell for less, apartments on 4-numbered floors are discounted, and hospitals physically remove the digit. The market treats 4 as unlucky regardless of whether any individual believes in it.
Do all Chinese people avoid 4?
No. The avoidance is stronger in the south and weaker in the north, and it varies by age and education. Younger urban Chinese are often more relaxed about 4 than their parents. But the buildings, the elevator panels, and the price sheets still reflect the older habit.
Why is 13 unlucky in the West?
The Western fear of 13 has a different history, rooted in Christianity and Norse mythology. The Chinese fear of 4 has a different history, rooted in Mandarin homophones. The two traditions arrive at similar behavior — skipping a number on a door — from completely different places.
Is there a number more unlucky than 4 in Chinese culture?
In some regions, 44 and 444 are considered worse than 4 alone. But 4 is the root. Other candidates for “most unlucky” depend on the context: 7 in some Buddhist contexts (linked to death rituals), 0 in a few regional traditions, and 250 as a slang insult. None of them reach the everyday reach of 4.
What about the number 14, 24, or 44?
All three are considered worse than 4 alone, especially when they appear at the end of a phone number, plate, or floor count. Floor 14 is skipped more often than floor 4 in new buildings. Floor 44 is rare in residential towers for the same reason.
Does tetraphobia affect brand naming?
Yes. Major brands adjust their Chinese names and product numbering to avoid 4. Car trim levels skip from 3-series to 5-series, phone models jump from 13 to 15, and apartment blocks are numbered 1, 2, 3, 5. This is why you will rarely see a “Series 4” anything sold in mainland China or Taiwan.
What to take away
The number 4 is the most consistently avoided digit in Chinese culture. The reason is small, clean, and phonetic: sì sounds like sǐ. From this single accident comes elevator buttons that skip a floor, hospital wards that renumber, phone numbers that lose value, and gift-giving rules that warn against four of anything.
For a foreigner in China, this is one of the easiest cultural rules to learn, because it has clear, measurable consequences. Watch the floors. Count the oranges. Skip the 4th of the month for big plans. The rest of Chinese numerology is more poetic. The number 4 is just practical.
