Baidu Inc (Baidu) is a provider of artificial intelligence (AI) and internet search services. It primarily engaged in providing online marketing services, cloud services, and intelligent driving solutions. The company provides a full AI stack, including cloud infrastructure, deep learning frameworks PaddlePaddle, and AI applications. The company serves various industries, including healthcare, retail, e-commerce, entertainment and media, online games, business services, life services, and transportation. Baidu's key activities include offering search and feed services, AI-powered marketing solutions, autonomous driving technologies, and online video content through its subsidiary iQIYI.

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Baidu’s R&D arm focuses on technology and innovation by investing heavily in research and development to stay at the forefront of the internet industry and achieve long-term growth and success. The company has been investing in AI since 2010 and has opened its AI platform to a large community of developers to improve AI capabilities and accelerate large-scale implementation. Baidu Inc's AI capabilities are powered by a four-layer end-to-end AI stack, which includes cloud infrastructure, the in-house developed deep learning framework PaddlePaddle, self-developed ERNIE foundation models, and applications. The company has a team of experienced engineers based mostly in Beijing, Shanghai, and Shenzhen, China, and development centers in Sunnyvale, California. Baidu Inc competes aggressively for engineering talent and recruits most engineers locally, establishing various recruiting and training programs with leading universities in China, as well as recruiting experienced engineers globally. The R&D units of Baidu include research labs in China and the United States. These units enhance the company's research and development capabilities, including AI and other areas. As of December 2025, the company holds 23,771 issued patents in mainland China. In FY2025, Baidu incurred an expenditure of CNY22,133 million, which as a percentage of revenue stood at 15.8%.