Producer
Tongwei Co., Ltd.
World's largest polysilicon producer by capacity (~910,000 MT); also makes solar cells, modules, and animal feed — the dual-use company that pivoted from aquaculture to solar manufacturing.
4
Inputs supplied
1
Goods downstream
3
Facilities
1
Stories
What they make
4 inputs Tongwei Co., Ltd. supplies
Click an input to see every good that depends on it, every country that produces it, and every other company in the supply chain.
manufactured
Solar-Grade Polysilicon →
manufactured
Aquaculture Compound Feed (Fish / Shrimp Complete Diet) →
manufactured
Electronic-Grade Polysilicon (11N, for Semiconductor Wafers) →
manufactured
Solar-Grade Polysilicon →
Where it shows up
Goods downstream
Essential goods that depend on something Tongwei Co., Ltd. makes, pick one to see the full supply chain.
Where they make it
3 facilities
Tongwei -- Chengdu, Sichuan (Aquafeed HQ) →
CNChengdu, Sichuan Province, China · manufacturing_plant
Tongwei Group headquarters in Chengdu; largest aquaculture feed producer in China and world's largest carp/freshwater fish feed producer. Tongwei has 100+ feed mills across China serving the world's largest aquaculture market. Same Tongwei Group is also China's largest solar wafer and solar cell producer -- aquafeed and solar panels from one Chinese conglomerate.
Tongwei Baotou Polysilicon Plant →
CNInner Mongolia · manufacturing
Tongwei's largest polysilicon facility at ~345,000 MT capacity; located in Baotou, Inner Mongolia; NOT in Xinjiang so lower UFLPA exposure than GCL/Daqo
Tongwei Leshan Solar Industrial Base →
CNSichuan · manufacturing
Tongwei's original polysilicon base in Leshan, Sichuan; also produces solar cells; ~200,000 MT polysilicon capacity
What else they do
Business segments
The company's full revenue map, where this supply-chain role fits within their broader business.
Polysilicon
55%Solar Cells (PV Cells)
25%Solar Modules
10%Aquaculture Feed (Tongwei's Original Business)
10%
Stories from the supply chain
Editorial about Tongwei Co., Ltd.
Intelligence
What's known
Sourced claims about this company's role in supply chains, chokepoints, concentration, incidents, dual-use connections.
Did you know2024
Tongwei Co., Ltd. is simultaneously China's largest aquaculture feed producer (100+ feed mills, primarily carp and freshwater fish) AND China's largest solar cell manufacturer (accounting for ~20%+ of global solar cell production). The same Chengdu-headquartered conglomerate feeds the fish on Chinese dinner tables and manufactures the solar cells on Chinese and global rooftops. No other company in the world has a dominant position in both the food system and the solar energy supply chain. Tongwei's aquafeed division generates ~$8-10B revenue; its solar division ~$10-15B.
Tongwei Co., Ltd. ↗Origin2023
Tongwei Co., Ltd. was founded in 1984 in Chengdu, Sichuan by Xie Yifang as a fish feed company — producing compound aquaculture feed for China's inland fish farming industry. By the early 2000s, Tongwei had become one of China's largest aquaculture feed producers, a position it maintains today. In 2006, Xie recognized the solar industry opportunity and pivoted Tongwei's industrial resources into polysilicon manufacturing. By 2024, Tongwei had become the world's largest polysilicon producer (~26% global market share, 910,000 MT/year capacity) while still operating its original aquaculture feed business. A fish feed company became the dominant global supplier of the primary raw material for solar panels — one of the most dramatic corporate transformations from food to clean energy in modern industrial history.
Tongwei Co., Ltd. ↗Capacity2023
Tongwei's polysilicon plants in Sichuan (Leshan, Yongxiang) are powered predominantly by hydroelectric power from Sichuan's extensive river systems — giving Tongwei a lower carbon intensity and lower operating cost for polysilicon production than competitors located in coal-heavy regions like Xinjiang. This geographic advantage also reduces UFLPA (Uyghur Forced Labor Prevention Act) import risk compared to GCL-Poly and Daqo, whose primary production is in Xinjiang. In 2024-2025, a global polysilicon oversupply crisis (prices down ~80% from 2022 peaks) has put enormous pressure on all producers; Tongwei's hydropower cost advantage and non-Xinjiang supply chain position make it relatively better positioned to survive the downcycle.
Tongwei Co., Ltd. ↗