In Chinese internet slang, 666 (read liù liù liù) is a compliment. It means "awesome," "smooth," or "well played." It has no connection to the Western "number of the beast." The two meanings grew up separately and have never met.
The pun behind it: 六 sounds like 溜
The number 6 is 六 (liù). The adjective 溜 is also liù, and in casual speech it means "smooth," "fluent," or "skilled." Same sound, different character. That is the whole mechanism.
Typing three 6s is therefore typing "smooth smooth smooth," stacking the same compliment three times for emphasis. More 6s means more enthusiasm: 6666 and 66666 are common, and the count rises with how impressed the sender is.
How 溜 is actually used
In everyday speech, liù describes anything done well and without visible effort. Someone whose English flows might be told nǐ de yīngyǔ hěn liù (你的英语很溜, "your English is really smooth"). A cook who turns out a good dish might get zhēn liù (真溜, "seriously slick"). The word carries a note of admiration for effortlessness, which is exactly what makes it work as applause.
Liù is also a sharp fourth-tone fall. Spoken aloud, liù liù liù has a percussive, clapping quality, and that rhythm is a large part of why it lands as a reaction rather than a statement.
Where it started
666 spread through Chinese gaming and livestream culture in the early 2010s. Viewers would spam it in chat when a streamer landed a clean headshot, pulled off a clever play, or did anything worth celebrating. From there it moved into everyday texting, WeChat messages, comment sections, and video 弹幕 (dànmù, comments that scroll across the video itself). Gaming is still where it is densest, but recognition now runs across the whole Chinese internet.
It is spoken language, not formal writing
666 is a spoken compliment that happens to be typed with digits, and that matters for register. In a group of friends who game together, saying liù liù liù out loud is normal. In a work chat, or anywhere a conventional tone is expected, people reach for 厉害 (lìhai, "impressive") or 牛 (niú, literally "cow," slang for "awesome") instead. Using 666 in a formal context reads roughly the way "lol" reads in a job application.
Is 6 a lucky number in China?
Yes, and for the same root reason. Because liù suggests 溜, the number 6 carries a sense of things going smoothly. The idiom 六六大顺 (liù liù dà shùn) means roughly "may everything go smoothly for you," and it is a standard blessing. So 666 works as slang and as good luck at the same time, which is part of why it travelled so far beyond gaming.
The Western 666 is a coincidence
The Western association comes from the Book of Revelation. The Chinese association comes from a one-character pun about being good at things. When a Chinese speaker sends "666!!!" after an impressive play, the meaning is pure celebration. The two traditions share three digits and nothing else.
Other number codes built the same way
| Code | Sounds like | Means |
|---|---|---|
| 520 | wǒ ài nǐ | I love you (我爱你) |
| 1314 | yīshēng yīshì | for a lifetime (一生一世) |
| 888 | fā fā fā | prosperity, three times over (发发发) |
| 555 | wū wū wū | crying (呜呜呜) |
| 233 | èr sān sān | lol |
233 is the odd one. It is not a sound-alike at all. It was the number of a laughing emoji on an early Chinese forum, and it outlived the forum. Not every number on this list is a homophone, but most are, and that is enough to make the whole system feel like a code.
Key words
| Chinese | Pinyin | Meaning | |
|---|---|---|---|
| 六六六 | liù liù liù | awesome / smooth / well played (slang) | |
| 溜 | liù | smooth, skilled, fluent (the root word) | |
| 厉害 | lìhai | impressive, awesome |
Master 1–99 in Mandarin, with every digit tap-to-hear. Once the sounds click, all the number slang (666, 520, 1314, 888) makes instant sense.
FAQ
Is 666 lucky or unlucky in Chinese culture?
Positive, but for a different reason than the slang. The number 6 (liù) is generally considered lucky because it sounds like 溜 ("smooth, going well"). So 666 reads as "everything goes smoothly." This has no connection to the Western "number of the beast." The meanings are unrelated.
Why do Chinese gamers type 666?
It started in livestream chats as a hype reaction. When a player does something impressive, like a clean play or a clever move, viewers spam 666 (read liù liù liù, "smooth smooth smooth") to say "well played" or "awesome." More 6s means more hype.
Can I say 666 out loud, or is it only for texting?
666 is fundamentally spoken language. Saying liù liù liù out loud is common, especially among friends who game together. In more mixed company, people reach for 厉害 (lìhai, "impressive") or 牛 (niú, "awesome") instead.
The numbers, with audio
Count 1 to 100 with every digit tap-to-hear.