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A visitor sniffs a flower in the rosepark of Bad Nauheim in Steinfurth, Germany, on June 15, 2019. For nearly 150 years, roses have been cultivated in Steinfurth and exported all over the world. (Xinhua/Lu Yang)

A visitor sniffs a flower in the rosepark of Bad Nauheim in Steinfurth, Germany, on June 15, 2019. For nearly 150 years, roses have been cultivated in Steinfurth and exported all over the world. (Xinhua/Lu Yang)