As the host city of the first China International Import Expo,Shanghai is in the limelight.Three years ago,when Chinese President Xi Jinping paid a visit to Lincoln High School in Tacoma,in the Washington State of the United States,he told the students there,“If you want to know what China has experienced in the past 100 years,go to Shanghai.”In the past four decades since China’s reform and opening-up kicked off,Shanghai was a pioneer in international trade and economic cooperation.