More than 250 teachers and students from 13 countries and regions, including America, Russia, India and Singapore, are in Shanghai to show their achievements in science and technology innovation. They kicked off the Shanghai International Youth Science and Technology Expo 2018 and “Science and Technology Stars of Tomorrow” Invitational Tournament at the Shanghai Exhibition Center on Friday. Students’ scientific innovation works are showcased at the center. Most of their innovations are very practical to cope with public concerned problems.