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@MarkMa1990 MarkMa1990

@MarkMa1990

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Hongfeng Ma MarkMa1990

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  • Copenhagen

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  • šŸ‘‹ Hi, Iā€™m working as an optical engineer but I am interested in all subjects of engineering.
  • šŸ‘€ Iā€™m also interested in Social Psycology, Physics, Math, and other fundamental things.

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