Lin Xiucheng built a semiconductor powerhouse through aggressive expansion and local government backing. Now debt, market pressures and his arrest threaten his empire.
By Hua Xin
Sanan Optoelectronics (600703.SH) disclosed on the evening of Oct. 23, that it had received a notice from the family of its founder and actual controller: Lin Xiucheng had been arrested with the approval of the procuratorate on suspicion of embezzlement and misappropriation of funds.
The stock closed that day at 10.10 yuan, giving the company a market value of about 50.4 billion yuan ($7.56 billion) compared with a peak market capitalization of more than 200 billion yuan. Once among Fujian province’s wealthiest residents, Lin made his first fortune trading scrap steel in the 1980s before entering steelmaking in 1992. His biggest bet came after he encountered LED technology at a trade fair in Shenzhen in 1999. He set up Sanan Electronics and despite racking up a cumulative loss of about 600 million yuan in its first three years, it achieved mass production of ultra-high-brightness LED chips in 2003 and helping break China’s dependence on imports.
Backdoor listing
In 2007, Lin acquired a controlling stake in a troubled listed company for a total outlay of about 149 million yuan. The following year, he injected Sanan’s LED assets into the business, which resumed trading as Sanan Optoelectronics. The listing helped propel the family’s paper wealth more than tenfold over the following years.
Sanan’s expansion relied on a mutually beneficial arrangement with local governments: the company brought investment, jobs and industrial capacity, while authorities provided land, subsidies and funding. Production bases sprang up in Wuhu, Quanzhou, Changsha, Ezhou and Chongqing.
Media estimates put Sanan Optoelectronics’ cumulative government subsidies since its 2008 listing at more than 11.3 billion yuan. State-backed investors in Hubei, Hunan and Chongqing also invested more than 20 billion yuan in Sanan-related businesses.
The strategy transformed the LED industry. By 2017, Sanan had about 360 metal-organic chemical vapor deposition machines, up from just over 10 in 2012, and an estimated 12% share of the global market. Its capacity expansion helped drive down chip prices and accelerate LED adoption, contributing to China’s emergence as the world’s largest LED chip production base.
But the model depended on continued financing and growth. Lin repeatedly pledged shares in the listed company to fund expansion, leaving the group vulnerable when market conditions deteriorated.
LED overcapacity and price wars eroded profitability, while Sanan’s silicon carbide business encountered a global capacity glut. Production lines were still ramping up as depreciation costs mounted, and government subsidies declined.
For 2025, Sanan reported revenue of 17.9 billion yuan, up 11.45% on the previous year, but a net loss attributable to shareholders of 353 million yuan — its first annual loss since listing.
Creditors close in
Lin was placed under investigation and detention in March. Sanan shares fell by the daily 10% limit and lost 24% of their value over five trading sessions. Creditors subsequently moved to protect their positions, triggering early repayment clauses and a wave of claims against the controlling shareholders.
By Oct. 14, all 1.312 billion Sanan Optoelectronics shares held by Sanan Electronics and Sanan Group had been subject to a court-ordered freeze, representing 26.30% of the listed company. Additional pending freezes covered shares equivalent to more than six times the controlling shareholders’ holdings.
In October, state-backed investors in Hubei and Hunan applied to restructure Sanan Electronics and Sanan Group. An earlier application by an individual creditor had been withdrawn in September.
The reversal is striking: local industrial investors that helped finance Sanan’s expansion are now seeking to restructure its controlling shareholders. Media estimates put the group’s publicly disclosed hard debt at about 12 billion to 15 billion yuan.
Can the family keep control?
Lin stepped down as Sanan Optoelectronics chairman in 2017, handing the role to his eldest son, Lin Zhiqiang. But he remained chairman and general manager of Sanan Group, retaining a 59.68% stake. He and his son together controlled about 71.83% of the group, which in turn controls Sanan Electronics. His younger son, Lin Zhidong, is a director and deputy general manager, while son-in-law Lin Kechuang is vice chairman and general manager.
The arrest announcement did not identify the entity involved in the alleged offenses. The allegations therefore should not automatically be equated with wrongdoing at the listed company. But the case raises questions about whether the formal separation between founder and listed business offers sufficient protection from risks elsewhere in the group.
Sanan has continued operating. In the first half of 2026, revenue fell 28% to 6.47 billion yuan, largely because the company stopped recognizing revenue from precious-metal waste recycling. Excluding that factor, revenue rose 8.97%. Sanan nevertheless recorded a net loss of 98 million yuan and an adjusted net loss of 504 million yuan.
Its LED chip business remained resilient, with revenue rising 11.8% to 3.1 billion yuan. Integrated circuits revenue fell 15.4% to 1.27 billion yuan, with filters and silicon carbide weighing on profitability.
AI-related optical chips offer a potential bright spot. Sanan has partnerships with four of the world’s 10 largest optical module makers and is shipping 400G and 800G chips in volume, while testing 1.6T products. It plans to increase monthly capacity from 2,750 wafers to 4,500.
Yet the capital burden remains heavy. Investment in the Hunan silicon carbide project had reached 21.2 billion yuan by the end of June, exceeding its 16 billion yuan budget by more than 30%. A Hubei Mini/Micro LED project is two years behind schedule, while investment in a planned 7 billion yuan Chongqing substrate plant stood at just 1.16 billion yuan.
Sanan now faces three tests: resolving the frozen shares and potential change of control; restructuring the controlling shareholders’ debts; and proving that the next generation can run the business independently of Lin Xiucheng’s relationships and influence.
His appetite for risk, combined with local government backing and leverage, helped build a major Chinese compound semiconductor platform. But the same strategy left the group exposed when markets turned and financing tightened. Sanan’s future will depend on whether it can replace founder-driven expansion with sustainable growth, transparent governance and genuinely independent management.
