WhereIsAtlas · Search
What Happened to Baidu?
Baidu turned a Song dynasty poem into China's dominant search engine — then medical-ad scandals, a first-ever loss and the AI chatbot era forced it to reinvent itself.
Baidu built the search engine that most of China uses and made a fortune from advertising next to the results. Paid medical listings, the Wei Zexi scandal and slowing ad growth broke that model, and Baidu is now betting its future on AI — Ernie Bot, Apollo robotaxis and its own chips — while its core search business faces the same disruption it once inflicted on print.
A search engine named after a poem
Baidu was founded in January 2000 in Beijing by Robin Li and Eric Xu, two engineers who had already spent years working on search. Li's earlier RankDex system used the links between pages to rank them — the same insight that made Google's PageRank famous — and Baidu was built on a version of that idea, focused on Chinese-language pages that Western search engines handled badly.
The name is a literary reference. It comes from a line by the Song dynasty poet Xin Qiji about looking for someone a thousand times over in a crowd, which made "Baidu" a graceful pun on persistent searching. From the start the company positioned itself as the engine that understood China — its language, its sites and its censorship regime — rather than a translated American product.
The Google of China
That bet paid off. Baidu became the default way Chinese internet users found things, and in August 2005 it listed on the Nasdaq, priced at $27 a share and rising sharply on its first day. When Google pulled back from mainland China in 2010 over censorship, Baidu's most serious competitor removed itself from the field, and Baidu's share of Chinese search became a near-monopoly.
Around the core engine, Baidu built the products that kept users inside its walls: Baidu Baike, a Chinese-language encyclopedia; Baidu Tieba, message boards organised around search terms; Baidu Zhidao for questions and answers; Baidu Map; Baidu Cloud; and the video service iQiyi, which it listed separately in New York in 2018. For a decade, Baidu, Alibaba and Tencent were spoken of together as the three giants of Chinese technology.
The advertising problem
Almost all of Baidu's money came from advertising placed alongside search results, and the most lucrative category was medicine. That is where the trouble started. In 2016 a 21-year-old student named Wei Zexi died after pursuing an experimental cancer treatment he had found through a Baidu listing, which turned out to be promoted by a hospital with dubious credentials. The death became a national scandal over paid medical advertising, regulators demanded changes to how Baidu ranked and labelled such results, and the company's reputation for trustworthiness took damage it has never fully repaired.
A second controversy over medical advertising followed in 2018. By then the search business was also facing structural pressure: users were spending more time in short-video feeds and super-apps, where search is a feature rather than a destination, and advertisers followed them. In the first quarter of 2019, Baidu reported its first quarterly loss since its IPO, and one of its most senior executives departed.
The AI bet
Baidu's response was to try to own the next layer of the internet rather than the last one. It launched the ERNIE language model in 2019, opened its Apollo platform for autonomous driving in 2017 and turned it into the Apollo Go robotaxi service, designed its own Kunlun AI chips from 2018, and pushed its cloud business toward AI workloads. When ChatGPT made large language models a global obsession, Baidu was first out of the gate in China with Ernie Bot in March 2023 — days ahead of its domestic rivals.
The strategy is coherent and expensive. Baidu is spending heavily on chips, data centres and models at the same moment its advertising revenue is softening, and the pay-off is not yet visible in the numbers: revenue has fallen as AI returns fail to offset the decline in ads. AI is both Baidu's best hope and the thing eating its lunch.
The structure question
Baidu's corporate shape is an unavoidable part of its story. Like most large Chinese internet companies, it is a holding company incorporated in the Cayman Islands whose Chinese operating businesses are held through variable interest entities — a structure built so that foreign investors can own shares in a Chinese business that Beijing does not allow them to own directly. Its founder holds special voting shares, and its shares trade on the Nasdaq and, since March 2021, on the Hong Kong exchange as well.
That arrangement has been both a marvel and a risk. It let Baidu raise American capital in 2005 and gave it a second home listing when US-China tensions made Chinese listings uncomfortable, but it also means the company sits at the intersection of two regulatory systems, exposed to whoever is angrier at the time — Chinese antitrust and data regulators, or American auditors and lawmakers.
Where Baidu is now
Baidu is still the search engine most people in China use, still profitable, and still one of the country's biggest technology companies — but it is no longer described as an unassailable monopoly. Its advertising business is being squeezed from two sides: short-video platforms that capture attention before a search happens, and AI assistants that answer the question without ever showing a link.
So Baidu is asking its investors to value it as an AI company instead: Ernie Bot and the ERNIE models, Apollo Go's robotaxis, Kunlun chips and an AI cloud business. It is the same pivot everyone in the industry is attempting, made harder by the fact that Baidu is defending a franchise that AI is specifically designed to dismantle. The company that taught China how to look things up is now trying to be the thing that answers.
Entries in this story
Sources
- Baidu - Wikipedia — Wikipedia (2026-09-15)
- China's Baidu revenue drops as AI returns fail to offset ad decline — Reuters (2026-09-15)
- Baidu posts first quarterly loss since IPO, top exec quits — People's Daily (2026-09-15)
- Baidu, Inc. Files Its Annual Report on Form 20-F — Nasdaq (2026-09-15)