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$Graduate students enter the venue before the Columbia University Commencement ceremony in New York, the United States, May 22, 2019. The Columbia University Commencement ceremony of the 265th academic year took place on Wednesday. More than 17,000 students from Columbia\'s 18 schools and affiliates graduated this year. (Xinhua/Wang Ying)$

Graduate students enter the venue before the Columbia University Commencement ceremony in New York, the United States, May 22, 2019. The Columbia University Commencement ceremony of the 265th academic year took place on Wednesday. More than 17,000 students from Columbia's 18 schools and affiliates graduated this year. (Xinhua/Wang Ying)

$Graduate students take a selfie before the Columbia University Commencement ceremony in New York, the United States, May 22, 2019. The Columbia University Commencement ceremony of the 265th academic year took place on Wednesday. More than 17,000 students from Columbia\'s 18 schools and affiliates graduated this year. (Xinhua/Wang Ying)$

Graduate students take a selfie before the Columbia University Commencement ceremony in New York, the United States, May 22, 2019. The Columbia University Commencement ceremony of the 265th academic year took place on Wednesday. More than 17,000 students from Columbia's 18 schools and affiliates graduated this year. (Xinhua/Wang Ying)

$Graduate students pose for photos on campus after the Columbia University Commencement ceremony in New York, the United States, May 22, 2019. The Columbia University Commencement ceremony of the 265th academic year took place on Wednesday. More than 17,000 students from Columbia\'s 18 schools and affiliates graduated this year. (Xinhua/Wang Ying)$

Graduate students pose for photos on campus after the Columbia University Commencement ceremony in New York, the United States, May 22, 2019. The Columbia University Commencement ceremony of the 265th academic year took place on Wednesday. More than 17,000 students from Columbia's 18 schools and affiliates graduated this year. (Xinhua/Wang Ying)

$Graduate students from China pose for photos on campus after the Columbia University Commencement ceremony in New York, the United States, May 22, 2019. The Columbia University Commencement ceremony of the 265th academic year took place on Wednesday. More than 17,000 students from Columbia\'s 18 schools and affiliates graduated this year. (Xinhua/Wang Ying)$

Graduate students from China pose for photos on campus after the Columbia University Commencement ceremony in New York, the United States, May 22, 2019. The Columbia University Commencement ceremony of the 265th academic year took place on Wednesday. More than 17,000 students from Columbia's 18 schools and affiliates graduated this year. (Xinhua/Wang Ying)

$Graduate students from China pose for photos before the Columbia University Commencement ceremony in New York, the United States, May 22, 2019. The Columbia University Commencement ceremony of the 265th academic year took place on Wednesday. More than 17,000 students from Columbia\'s 18 schools and affiliates graduated this year. (Xinhua/Wang Ying)$

Graduate students from China pose for photos before the Columbia University Commencement ceremony in New York, the United States, May 22, 2019. The Columbia University Commencement ceremony of the 265th academic year took place on Wednesday. More than 17,000 students from Columbia's 18 schools and affiliates graduated this year. (Xinhua/Wang Ying)

$Graduate students attend the Columbia University Commencement ceremony in New York, the United States, May 22, 2019. The Columbia University Commencement ceremony of the 265th academic year took place on Wednesday. More than 17,000 students from Columbia\'s 18 schools and affiliates graduated this year. (Xinhua/Wang Ying)$

Graduate students attend the Columbia University Commencement ceremony in New York, the United States, May 22, 2019. The Columbia University Commencement ceremony of the 265th academic year took place on Wednesday. More than 17,000 students from Columbia's 18 schools and affiliates graduated this year. (Xinhua/Wang Ying)

$Graduate students from China attend the Columbia University Commencement ceremony in New York, the United States, May 22, 2019. The Columbia University Commencement ceremony of the 265th academic year took place on Wednesday. More than 17,000 students from Columbia\'s 18 schools and affiliates graduated this year. (Xinhua/Wang Ying)$

Graduate students from China attend the Columbia University Commencement ceremony in New York, the United States, May 22, 2019. The Columbia University Commencement ceremony of the 265th academic year took place on Wednesday. More than 17,000 students from Columbia's 18 schools and affiliates graduated this year. (Xinhua/Wang Ying)