| 2026-03-17 | Beijing Tongmei Xtal Technology Co., Ltd. | China |
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| 2026-03-17 | Nanjing Jin Mei Gallium Co., Ltd. | China |
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| 2026-03-17 | Beijing BoYu Semiconductor Vessel Craftwork Technology Co., Ltd. | China |
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| 2025-03-14 | Beijing Tongmei Xtal Technology Co., Ltd. | China |
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| 2025-03-14 | Nanjing Jin Mei Gallium Co., Ltd. | China |
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| 2025-03-14 | Beijing BoYu Semiconductor Vessel Craftwork Technology Co., Ltd. | China |
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| 2024-03-15 | Beijing Tongmei Xtal Technology Co., Ltd. | China |
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| 2024-03-15 | Nanjing Jin Mei Gallium Co., Ltd. | China |
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| 2024-03-15 | Beijing BoYu Semiconductor Vessel Craftwork Technology Co., Ltd. | China |
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| 2023-03-16 | Beijing Tongmei Xtal Technology Co., Ltd. | China |
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| 2023-03-16 | Nanjing Jin Mei Gallium Co., Ltd. | China |
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| 2023-03-16 | Beijing BoYu Semiconductor Vessel Craftwork Technology Co., Ltd. | China |
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| 2022-03-15 | Beijing Tongmei Xtal Technology Co., Ltd. | China |
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| 2022-03-15 | Nanjing Jin Mei Gallium Co., Ltd. | China |
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| 2022-03-15 | Beijing BoYu Semiconductor Vessel Craftwork Technology Co., Ltd. | China |
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| 2021-03-23 | Beijing Tongmei Xtal Technology Co., Ltd. | China |
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| 2021-03-23 | Nanjing Jin Mei Gallium Co., Ltd. | China |
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| 2021-03-23 | Beijing BoYu Semiconductor Vessel Craftwork Technology Co., Ltd. | China |
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| 2020-03-12 | Ownership | |
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| 2020-03-12 | Beijing Tongmei Xtal Technology | |
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| 2020-03-12 | Nanjing Jin Mei Gallium Co., Ltd | |
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| 2020-03-12 | Beijing BoYu Manufacturing Co., Ltd | |
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| 2019-03-11 | Ownership | |
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| 2019-03-11 | Beijing Tongmei Xtal Technology | |
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| 2019-03-11 | Beijing Ji Ya Semiconductor Material Co., Ltd | |
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| 2019-03-11 | Nanjing Jin Mei Gallium Co., Ltd | |
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| 2019-03-11 | Beijing BoYu Manufacturing Co., Ltd | |
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| 2018-03-09 | Ownership | |
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| 2018-03-09 | Beijing Tongmei Xtal Technology | |
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| 2018-03-09 | Beijing Ji Ya Semiconductor Material Co., Ltd | |
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| 2018-03-09 | Nanjing Jin Mei Gallium Co., Ltd | |
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| 2018-03-09 | Beijing BoYu Manufacturing Co., Ltd | |
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| 2017-02-27 | Ownership | |
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| 2017-02-27 | Beijing Tongmei Xtal Technology | |
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| 2017-02-27 | Beijing Ji Ya Semiconductor Material Co., Ltd | |
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| 2017-02-27 | Nanjing Jin Mei Gallium Co., Ltd | |
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| 2017-02-27 | Beijing BoYu Manufacturing Co., Ltd | |
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| 2016-03-11 | Ownership | |
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| 2016-03-11 | Beijing Tongmei Xtal Technology | |
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| 2016-03-11 | Beijing Ji Ya Semiconductor Material Co., Ltd | |
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| 2016-03-11 | Nanjing Jin Mei Gallium Co., Ltd | |
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| 2016-03-11 | Beijing BoYu Manufacturing Co., Ltd | |
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