AMSTERDAM, Jan. 19, 2020 (Xinhua) — Neatly arranged tulips are seen on the Netherlands’ National Tulip Day in Amsterdam, the Netherlands, Jan. 18, 2020. Visitors pick their own tulips for free from about 200,000 tulips displayed at Dam Square in Amsterdam on Saturday. This annual event marks the start of the tulip season in the Netherlands. (Photo by Sylvia Lederer/Xinhua/IANS)