United-States born Eileen Gu won the inaugural women’s freestyle big air Olympic gold medal for hosts China at the Beijing Games on Tuesday. The 18-year-old “snow princess” earned the highest score of 94.5 on her third run at the new Big Air Shougang venue. Her two best scores put her top of the standings on 188.25 points. Gu, who left the US team in 2019 to compete for China, said the win was the best moment of her life. “The happiest moment, day, whatever — of my life. I just cannot believe what just happened.” She decided to pull out a “random trick”, a left double cork 1620, for her final …