Vietnamese marksman Hoang Xuan Vinh won the first-ever Olympic gold medal for Vietnam on the opening day of the ongoing Rio Olympics' events and in doing so prompted many local sports experts to maintain it was no fluke but the inevitable result of Vietnamese sports development.
The 42-year-old marksman Hoang Xuan Vinh, who has on Sunday won the first-ever Olympic gold medal for Vietnam, has two career secrets.
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