Buyers learn about a floor cleaning robot during the 137th edition of the China Import and Export Fair in Guangzhou, south China's Guangdong Province, April 16, 2025. The 137th edition of the China Import and Export Fair, also known as the Canton Fair, kicked off on Tuesday, with the number of export exhibitors exceeding 30,000 for the first time in the history of this famous event. Products reflecting concept of green innovation, including intelligent energy-saving devices and eco-friendly technology products, have garnered favor of foreign merchants during the fair. (Xinhua/Lu Hanxin)