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, and AI applications. The company serves various industries, including healthcare, retail, e-commerce, entertainment and media, online games, business services, life services, and transportation.

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Baidu’s R&D arm focuses on technology and innovation, particularly in artificial intelligence (AI) and deep learning. The company has invested heavily in research and development to enhance its capabilities, including the establishment of research labs in China and the US. Baidu has developed a self-developed four-layer AI stack, which includes cloud infrastructure, the deep learning framework PaddlePaddle, ERNIE foundation models, and applications. The company has also launched several versions of its ERNIE models, including ERNIE 3.0 Titan, ERNIE 3.5, and ERNIE 4.0 (EB4). Baidu's R&D efforts also include the development of AI chips and a proprietary technological infrastructure for search, marketing services, and large-scale systems. The company’s R&D units are primarily based in Beijing, Shanghai, and Shenzhen, China, with additional development centers in Sunnyvale, California. These units are responsible for managing the company's R&D activities, including recruiting and training engineers, collaborating with leading universities, and developing AI technologies and infrastructure. As of December 2024, the company holds 25,096 issued patents in mainland China. In FY2024, Baidu incurred an expenditure of CNY22,133 million, which as a percentage of revenue stood at 16.6%.