Group 1 - The 31st China Lanzhou Investment and Trade Fair opened in Lanzhou, Gansu Province, attracting over 2,000 domestic and international enterprises to participate [1] - The theme of this year's fair is "Sharing Opportunities, Seeking Development, Creating Prosperity," with Indonesia as the guest country, and participation from over 20 countries including Germany, Spain, Russia, Malaysia, and Iran [1] - The fair features four exhibition areas focusing on international cooperation along the Silk Road, regional cooperation, Gansu's unique industries, and fashion consumer goods, showcasing nearly 40 categories and over 10,000 products [1] Group 2 - The Lanzhou Fair is the largest and most influential international economic and trade event in Gansu Province, having been held 31 times since its inception in 1993, serving as a "golden signboard" for the province's opening up and investment attraction [2] - This year's fair has signed 1,181 investment projects with a total signed amount exceeding 650 billion yuan, covering sectors such as renewable energy, equipment manufacturing, specialty agricultural products, food processing, new materials, digital information, and non-ferrous metallurgy [2]