🧠 A goofy AI personality quiz took over Chinese social media this spring, and the brands that moved fastest turned a meme into free advertising almost overnight. Within about a day of the test going viral, Luckin Coffee, Starbucks and Duolingo had each built and launched their own branded version of it. If you sell in China and want to know what “fast” actually means here, this is the case to study.
The test that broke the servers
It started on the evening of April 9, when a content creator on Bilibili released a personality quiz called SBTI. Built with AI and loosely modeled on the Western MBTI format, it only asked 31 questions and gave a result in five minutes. What made it spread was not the format, it was the labels. Instead of flattering categories, SBTI handed people mocking, self deprecating tags such as “厵咑” (close to “poor sucker” in local slang), “送钱者” or “ATM-er” (the friend who always ends up paying), “尤物” (bombshell) and “伪人” (fake person, meaning someone who is not being real). The line that pushed it everywhere was blunt: MBTI is outdated, SBTI is here.
Traffic exploded so fast that the servers crashed more than once. Many users could only join in by reposting screenshots of other people’s results. A handful of celebrities shared their own SBTI type without being paid to, which pulled the topic onto Weibo’s trending list and kept it there for days. By the next morning, brand marketing teams across China had a decision to make: jump in now, or watch the moment pass.
Luckin Coffee: first out of the gate
Luckin Coffee moved first. By the morning of April 10, its account had already published “RUTI型人格测试” (the RUTI Personality Test), a branded remix that tied every result directly to a drink. The type “YYDS” (roughly “the GOAT”) pointed people to a strong Americano, and “YEYEYE,” the type built for someone who “can’t stop the music,” was linked to Luckin’s triple coconut latte, a nod to its collaboration with singer David Tao. The mechanic copied SBTI almost exactly. Every label just pulled the user back to something Luckin sells. Coffee chains in China have been fighting this hard for attention for a reason: I broke down the wider pressure they are under in China’s Tea and Coffee Shakeout: Why the Winners Are Building a Slow Business.
Starbucks: same day, different angle
Starbucks launched “XBTI型人格” the same day. Its labels leaned on everyday stress rather than product jokes: “周一焦虑者” (the Monday Anxiety type), “学罢者” (the type who has given up on studying) and “增肌困难者” (the type who can never build muscle). Every result rolled straight into a pitch for the chain’s new high protein drink line, framed as the fix for whatever the quiz just diagnosed. Commenters on the post praised how fast and how accurately Starbucks had read the room, which is exactly the reaction a good newsjacking campaign is built to earn.
Duolingo: the cautious version
Duolingo took the safest route of the three. Rather than reference SBTI or invent a similar sounding acronym, it published a “学习人格测试” (Learning Personality Test) with results like “急急者GOGO” (the type who rushes everything), “贝玩者PLAY-ER” (the type who would rather play) and “勤奋者JUAN” (the grinder). Every result nudged the user toward Duolingo’s daily streak habit. By staying away from the SBTI name and its edgier slang, Duolingo lowered its legal and reputational risk while still riding the same wave.
The pattern behind all three
Chinese marketing outlet Adquan (广告门), which broke down the case in detail, pointed to what separated the brands that pulled this off from the ones that stayed quiet: what the piece calls an “agile response mechanism,” a setup that lets a small team plan, design and publish inside a single business day. You can read the original Chinese writeup here: 好奇心周报乺SBTI刺屏，品牌热点借势的敏捷与边界 (Adquan).
The other pattern is restraint. Most brands that joined in dropped the original test’s harsher labels and swapped in more upbeat ones such as “领导者” (leader) or “行者” (the mover), keeping the joke but losing the sting. Playing along without crossing the line is not a new instinct for Chinese marketers. My colleagues at SEO Agency China looked at the same reflex around TV drama tie ins, see How China’s Cultural Moments Drive Sales for another case of a brand riding a cultural wave the moment it appeared, and this year’s World Cup showed the same agility on a bigger stage, which I covered in How Chinese Brands Rewrote World Cup Marketing.
Philip Chen’s take: what this means if you are not a Chinese brand
I have watched a lot of Chinese brands react to internet moments over the years, and the SBTI week is a clean example of the gap between fast and reckless. Luckin, Starbucks and Duolingo did not do the same thing. Luckin leaned into the joke with almost no filter, because that fits its playful, mass market image. Starbucks kept it a bit more polished and tied it straight to a new product, which fits a brand that still wants to look a little premium. Duolingo barely touched the risky part of the meme at all, because an education brand has more to lose from looking edgy. Same trend, three different levels of risk, each one matched to the brand’s own personality. That match is the real lesson here, not the speed by itself.
For a foreign brand watching from outside China, the instinct is often to copy what went viral, word for word, the moment you spot it. That almost never works. By the time headquarters approves a translation, the joke is already dead, and a direct copy usually reads as forced, or a little embarrassing, to a Chinese audience that can tell it was not made by someone who actually gets the reference.
What you can copy is the process, not the content. Luckin and Starbucks did not write these campaigns from scratch in six hours out of nowhere. Their local social teams already had the freedom to design, approve and publish without waiting on a long chain of sign offs. If you sell in China, that freedom is the piece worth building before the next meme hits: a small local team, with clear guardrails on tone and language agreed in advance, that can move in real time without asking permission every single time.
My advice to clients is simple. Decide ahead of time what your brand will never joke about, agree on that short list once, then get out of the way and let your China team react when something like SBTI shows up. Speed only works if the trust is already in place before the moment arrives.
Source (Chinese): Adquan (广告门), “好奇心周报乺SBTI刺屏，品牌热点借势的敏捷与边界.” The piece tracks how the SBTI personality quiz went viral in April 2026 and how Luckin Coffee, Starbucks and Duolingo each built a branded version within about a day.
About the author. Philip Chen is CEO of GMA (Gentlemen Marketing Agency), a digital marketing agency focused on the Chinese market. GMA has helped more than 1,000 brands grow in China across Baidu, WeChat, Douyin, Xiaohongshu and cross border e-commerce. Connect with Philip on LinkedIn.
