People have picnic under cherry blossoms on Roosevelt Island in New York, the United States, April 13, 2019. The Roosevelt Island Cherry Blossom Festival was held here on Saturday, attracting crowds of visitors. (Xinhua/Zou Guangping)

People enjoy the scenery of cherry blossoms on Roosevelt Island in New York, the United States, April 13, 2019. The Roosevelt Island Cherry Blossom Festival was held here on Saturday, attracting crowds of visitors. (Xinhua/Zou Guangping)

People enjoy the scenery of cherry blossoms on Roosevelt Island in New York, the United States, April 13, 2019. The Roosevelt Island Cherry Blossom Festival was held here on Saturday, attracting crowds of visitors. (Xinhua/Zou Guangping)

A woman enjoys the scenery of cherry blossoms on Roosevelt Island in New York, the United States, April 13, 2019. The Roosevelt Island Cherry Blossom Festival was held here on Saturday, attracting crowds of visitors. (Xinhua/Zou Guangping)

A woman poses for photos under cherry blossoms on Roosevelt Island in New York, the United States, April 13, 2019. The Roosevelt Island Cherry Blossom Festival was held here on Saturday, attracting crowds of visitors. (Xinhua/Zou Guangping)

People enjoy the scenery of cherry blossoms on Roosevelt Island in New York, the United States, April 13, 2019. The Roosevelt Island Cherry Blossom Festival was held here on Saturday, attracting crowds of visitors. (Xinhua/Zou Guangping)

A dancer poses for photos under cherry blossoms on Roosevelt Island in New York, the United States, April 13, 2019. The Roosevelt Island Cherry Blossom Festival was held here on Saturday, attracting crowds of visitors. (Xinhua/Zou Guangping)

People enjoy the scenery of cherry blossoms on Roosevelt Island in New York, the United States, April 13, 2019. The Roosevelt Island Cherry Blossom Festival was held here on Saturday, attracting crowds of visitors. (Xinhua/Zou Guangping)

People pose for photos under cherry blossoms on Roosevelt Island in New York, the United States, April 13, 2019. The Roosevelt Island Cherry Blossom Festival was held here on Saturday, attracting crowds of visitors. (Xinhua/Zou Guangping)

People enjoy the scenery of cherry blossoms on Roosevelt Island in New York, the United States, April 13, 2019. The Roosevelt Island Cherry Blossom Festival was held here on Saturday, attracting crowds of visitors. (Xinhua/Zou Guangping)

A dancer poses for photos under cherry blossoms on Roosevelt Island in New York, the United States, April 13, 2019. The Roosevelt Island Cherry Blossom Festival was held here on Saturday, attracting crowds of visitors. (Xinhua/Zou Guangping)

A girl enjoys the scenery of cherry blossoms on Roosevelt Island in New York, the United States, April 13, 2019. The Roosevelt Island Cherry Blossom Festival was held here on Saturday, attracting crowds of visitors. (Xinhua/Zou Guangping)