A college student (C) introduces a skyscraper architectural model to high school students during the college student innovation and entrepreneurship fair in Southeast University in Nanjing, capital of East China’s Jiangsu province, Dec 27, 2017. More than 430 works of the students were displayed in the fair.[Photo/Xinhua]

A student displays a soccer robot during the college student innovation and entrepreneurship fair in Southeast University in Nanjing, capital of East China’s Jiangsu province, Dec 27, 2017. More than 430 works of the students were displayed in the fair. [Photo/Xinhua]