The company makes the optical transceivers that link servers and switches over fibre inside data centres, and is counted as the largest producer of them in the world. The Zhongji group, registered in Longkou in Shandong, took in InnoLight, an optical communications firm founded in Suzhou in 2008, and the combined company trades in Shenzhen under 300308. Orders piled up as AI data centres multiplied, and it added a Hong Kong listing in July 2026. In June that year the Pentagon placed it on its list of firms tied to China's military, which made access to the American market the company's largest open question.
CEO Wang Weixiu (chairman) · Founded 1987 · HQ Longkou, Shandong, China · Exchange SZSE · Website innolight.com/