| 1983 |
- Yang Hsiang Precision Machinery Co. Ltd. was established. YHPM is specialized in different stainless steel finish machines.
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| 2011 |
- Top MetalTech Co., Ltd. was established. It starts business in commercialization of stainless steel materials and customer designed sheets.
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| 2015 |
- Mirror grinding & polishing machine for thicker plate was added to the production line.
Maximum processing size: 12mm thick, 5ft width and 6m length.
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| 2016 |
- Titanium Coating Machine (PVD Color) is added to the plant.
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| 2017 |
- Vibration Finish Machine was added to the plant.
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