Graduates from Xi'an International Studies University pose for photos at a graduation ceremony in Xi'an, capital of northwest China's Shaanxi Province, June 20, 2018. A total of 350 graduate representatives from 20 colleges and universities in Xi'an took part in a graduation ceremony held at the Yongning Gate Wednesday evening. (Xinhua/Liu Xiao)

Graduates head to a ceremony in front of the Yongning Gate in Xi'an, capital of northwest China's Shaanxi Province, June 20, 2018. A total of 350 graduate representatives from 20 colleges and universities in Xi'an took part in a graduation ceremony held at the Yongning Gate Wednesday evening. (Xinhua/Liu Xiao)

A graduation ceremony for college students is held in front of the Yongning Gate in Xi'an, capital of northwest China's Shaanxi Province, June 20, 2018. A total of 350 graduate representatives from 20 colleges and universities in Xi'an took part in the event Wednesday evening. (Xinhua/Liu Xiao)

A graduate poses for photos with a performer during a ceremony in Xi'an, capital of northwest China's Shaanxi Province, June 20, 2018. A total of 350 graduate representatives from 20 colleges and universities in Xi'an took part in a graduation ceremony held at the Yongning Gate Wednesday evening. (Xinhua/Liu Xiao)

Graduates from Xi'an Academy of Fine Arts pose for photos in front of the Yongning Gate in Xi'an, capital of northwest China's Shaanxi Province, June 20, 2018. A total of 350 graduate representatives from 20 colleges and universities in Xi'an took part in a graduation ceremony held at the Yongning Gate Wednesday evening. (Xinhua/Liu Xiao)

Graduates from Xi'an Peihua University pose for photos in front of the Yongning Gate in Xi'an, capital of northwest China's Shaanxi Province, June 20, 2018. A total of 350 graduate representatives from 20 colleges and universities in Xi'an took part in a graduation ceremony held at the Yongning Gate Wednesday evening. (Xinhua/Liu Xiao)

A graduate from Xi'an Peihua University poses for photos in front of the Yongning Gate in Xi'an, capital of northwest China's Shaanxi Province, June 20, 2018. A total of 350 graduate representatives from 20 colleges and universities in Xi'an took part in a graduation ceremony held at the Yongning Gate Wednesday evening. (Xinhua/Liu Xiao)