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A Chinese tin-mining and metals group that spans tin extraction, smelting, processing, export, and tin- and arsenic-based chemicals.

Last updated October 9, 2026

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Overview

Yunnan Tin is the brand and operating identity associated with Yunnan Tin Group (Holding) Company Limited, a Chinese metals group centered on tin. Its origins are traced to 1883, when the Qing-dynasty government established the Gejiu Manufacture & Commercial Bureau in Gejiu, Yunnan. Gejiu became the historical base of China’s tin industry and remains closely associated with the group’s identity, although the holding group is headquartered in Kunming. The group’s principal activities cover the tin value chain. These include mining and resource development, production of tin metal, smelting, downstream processing, international export, and the manufacture of chemicals based on tin and arsenic. This breadth gives Yunnan Tin a position beyond that of a standalone mine or smelter: it operates across raw-material supply, refined metal, industrial materials, chemical products, and trading. Tin output and related products serve industrial customers in China and overseas markets, although the available reference material does not provide a current geographic breakdown of sales or a complete product catalogue. Yunnan Tin is described as the largest tin producer and exporter in China and as one of the leading tin producers globally. Its importance reflects both the historical concentration of tin resources around Yunnan and the group’s vertically integrated model. The business has maintained a substantial role in China’s nonferrous-metals sector through mining, metallurgical production, processing, and export. The group’s operations also extend into arsenic-based chemicals, creating a product scope that is broader than the tin-metal market alone. The holding group is distinct from its listed subsidiaries. Yunnan Tin Company Limited was established in 1998 and listed on the Shenzhen Stock Exchange in 2000 under the ticker 000960.SZ. The group also owns Sino-Platinum Metals Company Limited, which is listed on the Shanghai Stock Exchange under 600459. The parent Yunnan Tin Group itself should not be conflated with either listed company. Yunnan Tin Company Limited has been described as the only stock company in China’s tin industry, while the wider group functions as the controlling industrial platform. The group has also undergone significant financial restructuring. In 2016, China Construction Bank entered into a debt-for-equity swap with Yunnan Tin Group, reportedly valued at nearly CNY 5 billion. The transaction formed part of the group’s capital and debt-restructuring history, although the available source does not provide the full terms, ownership consequences, or subsequent financial performance. Yunnan Tin’s public record also includes a corruption case involving former chairman Lei Yi. In 2013, Lei was reported to have been charged with accepting bribes, including alleged payments totaling approximately CNY 20 million. The case connected the group to China’s broader anti-corruption campaign and constitutes a significant governance event in its corporate history. No reliable current executive roster is provided in the reference material. Overall, Yunnan Tin remains an active Chinese tin and specialty-metals group whose identity is defined by long industrial continuity, vertically integrated tin operations, international export activity, and a broadening portfolio of chemical and advanced-material products. Yunnan Tin’s public record also includes a corruption case involving former chairman Lei Yi. In 2013, Lei Yi was reported to have been charged with corruption, including allegations of accepting bribes totaling approximately CNY 20 million. In 2015, the Yunnan High People’s Court approved a death sentence with a two-year reprieve for Lei Yi, along with lifetime deprivation of political rights and confiscation of all personal property. The case links the group to China’s broader anti-corruption campaign and constitutes a significant event in its corporate governance history. No reliable executive roster is provided in the reference material. Overall, Yunnan Tin remains an active Chinese tin and specialty-metals group whose identity is defined by long industrial continuity, vertically integrated tin operations, international export activity, and an expanding portfolio of chemicals and advanced materials.

History

Yunnan Tin’s history is rooted in Gejiu, a city in Yunnan that became one of China’s most important tin-producing centers. The group traces its origins to 1883, when the Qing-dynasty government established the Gejiu Manufacture & Commercial Bureau, also identified in historical accounts as China Merchants. This institutional beginning predates the modern corporate structure by more than a century, but it provides the foundation for Yunnan Tin’s claim to a long continuous role in the Chinese tin industry. The Gejiu base shaped the group’s industrial character. Rather than focusing only on extraction, Yunnan Tin developed around the connected activities required to commercialize tin: mining, ore treatment, smelting, refining, processing, and trade. Over time, the organization expanded into the production of tin-based and arsenic-based chemicals. This created an integrated industrial platform capable of supplying both primary metal and downstream materials. The available reference material does not describe every institutional reorganization, mine, refinery, or chemical facility, so the historical account is best understood as a summary of the group’s documented development rather than a complete chronology. In the modern corporate era, the group established listed operating companies. Yunnan Tin Company Limited was established in 1998 and became listed on the Shenzhen Stock Exchange in 2000. It trades under ticker 000960.SZ and is described as the only stock company in China’s tin industry. Yunnan Tin Group also owns Sino-Platinum Metals Company Limited, listed on the Shanghai Stock Exchange under ticker 600459. These companies are subsidiaries or affiliated listed platforms within the wider Yunnan Tin structure, and they should be distinguished from the unlisted holding group itself. Yunnan Tin’s business scope includes tin mining, tin-metal production, smelting, processing, and export. The group is described as China’s largest tin producer and exporter and as the largest tin producer in the world in the cited account. Its international role comes primarily through exports of tin metal and related products, while its domestic role is connected to China’s nonferrous-metals and chemical-materials industries. The group’s vertically integrated organization allows it to participate in multiple stages of the supply chain, from mineral resources to refined and chemically modified products. The group encountered financial pressure during China’s broader corporate-deleveraging and state-owned-enterprise restructuring period. In 2016, China Construction Bank entered into a debt-for-equity swap agreement with Yunnan Tin Group. The transaction was reported at nearly CNY 5 billion. The available source identifies the scale and counterpart but does not state the precise debt instruments, post-transaction ownership percentage, or long-term financial effects. It is nevertheless an important milestone because it shows the group using a major financial restructuring mechanism rather than relying solely on conventional repayment or refinancing. Governance issues also form part of Yunnan Tin’s public history. In 2013, former chairman Lei Yi was reported to have been charged with corruption and alleged bribery involving approximately CNY 20 million. The allegations reportedly involved payments from Chinese government officials and included Li Hongtao, chairman of Leed International Education Group. This episode placed Yunnan Tin within the context of China’s anti-corruption campaign and raised questions about executive governance, although the reference material does not provide a complete judicial outcome. More recently, the group has been associated with partnerships involving Indonesian companies PT Timah and MIND ID. These relationships indicate interest in international cooperation within the global tin supply chain, but the source does not specify whether they concern mining rights, processing, supply, technology, or investment. Yunnan Tin therefore remains an active, internationally oriented tin group whose identity combines nineteenth-century mining origins, modern listed subsidiaries, integrated metallurgy and chemicals, export activity, and continuing financial and governance challenges. Governance issues also form part of Yunnan Tin’s public history. In 2013, former chairman Lei Yi was reported to have been charged with corruption and alleged bribery involving approximately CNY 20 million. The allegations reportedly involved payments from Chinese government officials and included Li Hongtao, chairman of Leed International Education Group. In 2015, the Yunnan High People’s Court approved a death sentence with a two-year reprieve for Lei Yi, along with lifetime deprivation of political rights and confiscation of all personal property. This episode placed Yunnan Tin within the context of China’s anti-corruption campaign and raised questions about executive governance.

  • 2024

    Indonesian partnerships reported

    [1]

    Yunnan Tin was reported to have partnerships with PT Timah and MIND ID in Indonesia.

  • 2016

    Debt-for-equity restructuring agreed with China Construction Bank

    [1]

    Yunnan Tin Group entered a debt-for-equity swap with China Construction Bank reportedly valued at nearly CNY 5 billion.

  • 2015

    Death sentence with reprieve for former chairman Lei Yi becomes final

    [5]

    In 2015, the Yunnan High People's Court approved the death sentence with a two-year reprieve for Lei Yi, former chairman of Yunnan Tin Group, along with lifetime deprivation of political rights and confiscation of all personal property.

  • 2013

    Former chairman charged in corruption case

    [1]

    Former chairman Lei Yi was reported to have been charged over alleged bribery and corruption.

  • 2000

    Yunnan Tin Company Limited listed in Shenzhen

    [1]

    Yunnan Tin Company Limited began trading on the Shenzhen Stock Exchange under ticker 000960.SZ.

  • 1998

    Yunnan Tin Company Limited established

    [1]

    Yunnan Tin Company Limited was established as a modern listed-company platform within the wider Yunnan Tin group.

  • 1883

    Gejiu Manufacture & Commercial Bureau established

    [1]

    The Qing-dynasty government established the Gejiu Manufacture & Commercial Bureau, the institutional predecessor associated with Yunnan Tin’s historical origins.

Products and positioning

A vertically integrated Chinese tin and specialty-metals group with historical roots in Gejiu, combining mining, smelting, downstream processing, chemical production, and export.

  • Tin metal

    Refined tin metal

    Refined tin is a core output of Yunnan Tin’s mining and metallurgical chain. The group’s documented activities include tin production, smelting, processing, and export, placing refined tin at the center of its industrial and international-business profile. The available source does not specify grades, brands, or individual product specifications.

  • Tin metal

    Tin ingots

    Tin ingots represent a commercially transportable form of refined tin supplied to industrial customers and export markets. They are part of the group’s primary-metal offering and reflect its role as a major Chinese producer and exporter. No detailed information on dimensions, purity levels, packaging, or customer sectors is provided in the cited material.

  • Industrial chemicals

    Tin-based chemicals

    Yunnan Tin produces chemicals derived from tin, extending the group beyond mining and refined metal into downstream materials. These products form part of its integrated strategy of converting mineral resources into industrial chemical inputs. The reference material confirms the product family but does not identify individual compounds, applications, or commercial brand names.

  • Industrial chemicals

    Arsenic-based chemicals

    Arsenic-based chemicals are another documented part of Yunnan Tin’s manufacturing scope. Their inclusion reflects the group’s broader specialty-chemicals activities alongside tin mining and metallurgy. The available source does not provide a detailed product list, end-use profile, safety information, or current production volume.

Controversies

  • 2015

    Death Sentence with Reprieve for Former Group Chairman Lei Yi in Bribery Case Becomes Final

    In 2015, the Yunnan High People's Court approved the death sentence with a two-year reprieve for Lei Yi, former chairman of Yunnan Tin Group, in a bribery case, along with lifetime deprivation of political rights and confiscation of all personal property. The listed company's entry relates this as a matter involving a former group executive and does not attribute the bribery to product quality issues.

  • 2013

    Corruption charges involving former chairman Lei Yi

    Former Yunnan Tin chairman Lei Yi was reported to have been charged with corruption, including allegations of accepting bribes totaling approximately CNY 20 million. The cited account links the allegations to Chinese government officials and identifies Li Hongtao, chairman of Leed International Education Group, among the people connected to the case.

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Brand decisions

  • 2016

    Debt-for-equity swap with China Construction BankStrategy

    Background

    Yunnan Tin Group entered the transaction during a period when Chinese industrial groups were using restructuring measures to address leverage and financial pressure.

    Action taken

    China Construction Bank agreed to exchange debt claims for equity in a transaction reported to be worth nearly CNY 5 billion.

    Aftermath

    The deal became a major milestone in Yunnan Tin’s financial restructuring history. The available source does not establish the precise resulting ownership structure or long-term financial outcome.

    Reported transaction value. (2016)

Sources6 sources

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