Sanan Optoelectronics Co.,Ltd. (600703.SH) announced on March 22 that it had received a notice from its controlling shareholder, Fujian Sanan Group Co., Ltd., on March 21, 2026. The notice stated that the company's actual controller, Lin Xiucheng, has been placed under retention and is under investigation by the National Supervisory Commission. Lin Xiucheng has not held any position at the company since July 10, 2017. The company stated that its current production, operations, and management are normal, its corporate governance structure is sound, and the aforementioned matter is not expected to significantly impact the company's production and operations. The company will continue to monitor the progress of the situation and fulfill its information disclosure obligations.
Public information shows that Lin Xiucheng, born in 1955, holds a university degree and is a senior economist. He serves as the Chairman and General Manager of Fujian Sanan Group Co., Ltd.
Sanan Optoelectronics Co.,Ltd. is headquartered in Xiamen, Fujian Province, and focuses on the research, development, production, and sales of compound semiconductor materials and devices as its core business.
In the 1980s, Lin Xiucheng earned his first capital by purchasing scrap steel and selling it to factories. In 1992, he co-founded Sanan Ironmaking Plant in a joint venture with Fujian Sanming Iron and Steel Works.
In 1999, he entered the semiconductor field. Sanan Optoelectronics Co.,Ltd. was established in 2000. In 2008, the company went public on the A-share market through a backdoor listing. Sanan Optoelectronics Co.,Ltd. became a dominant player in China's LED chip industry, and Lin Xiucheng was once referred to as China's "LED King."
In 2017, Lin Xiucheng proactively handed over leadership, and his 43-year-old eldest son, Lin Zhiqiang, succeeded him as Chairman of Sanan Optoelectronics Co.,Ltd. After taking office, Lin Zhiqiang led the company through a transformation. In 2018, he directed the company to invest 33.3 billion yuan to develop industries including III-V compound semiconductor materials, LED epitaxy, chips, and microwave integrated circuits. Subsequently, the market capitalization of Sanan Optoelectronics Co.,Ltd. once exceeded 200 billion yuan, with annual revenue surpassing 10 billion yuan. After experiencing a cyclical downturn in the industry, the company's latest market capitalization is approximately 80 billion yuan.
Lin Xiucheng's two sons—eldest son Lin Zhiqiang and second son Lin Zhidong—as well as his son-in-law, Lin Kechuang, all hold important positions within the Sanan group. According to the 2026 Hurun Global Rich List, Lin Xiucheng and Lin Zhiqiang ranked third among the wealthiest individuals from Xiamen on the list, with a fortune of 16 billion yuan.
As the leader of Sanan Optoelectronics Co.,Ltd., Lin Zhiqiang is also active in the venture capital circle. Tianyancha data shows he is associated with dozens of enterprises, primarily participating in investments as a Limited Partner. For example, he committed capital to Shanghai Xianghe Hong'an Equity Investment Partnership, which is linked to Yonghua Investment, an early investor in Cambricon.
In terms of direct investments, Lin Zhiqiang plays a significant role in an institution named "Xinding Guorui." This fund has primarily invested in dozens of companies, including Jingsheng Co., Ltd., Lianxun Instruments, Conxi Communications, Yibei Technology, Chenxin Semiconductor, and Daoyuan Technology. Among these, Jingsheng Co., Ltd. and Conxi Communications are already listed on the A-share market.
Overall, the investment entities of Sanan Optoelectronics Co.,Ltd. and its leader Lin Zhiqiang are diversified and maintain a low-profile style. Their investments accurately target areas such as import substitution and hard technology, spanning from LEDs to integrated circuits, and from optical communication to RF front-ends.
It is noteworthy that recently, Guanglun Intelligence completed a 10 billion yuan financing round, making it the first unicorn enterprise globally in the embodied data field. Reviewing the long list of investors reveals a relatively unfamiliar name: Dingbang Investment. This is the family office of the Chairman of the A-share listed Sanan Optoelectronics Co.,Ltd., representing the Lin family from Quanzhou, Fujian.
Furthermore, on March 11, Sanan Optoelectronics Co.,Ltd. responded to investor inquiries on an interactive platform, stating that the company is engaged in deep cooperation with entities including Tsinghua University and China Mobile in the fields of Micro-LED optoelectronic devices and high-speed optical communication. They are jointly advancing the research, development, and application verification of related technologies. The Micro-LED light source devices produced by the company demonstrate excellent performance and have been sent as samples to leading domestic and international companies for module assembly verification.
In the secondary market, shares of Sanan Optoelectronics Co.,Ltd. closed at 16.54 yuan per share last Friday, with a latest market capitalization of 82.5 billion yuan.