Visitors compare the image quality of a QLED 8K television with a 4K television at the booth of Samsung during the 2018 IFA consumer electronics fair in Berlin, capital of Germany, on Aug. 31, 2018. The IFA 2018, which attracts 1,814 exhibitors from all over the world, kicked off on Friday and will last until Sept. 5. (Xinhua/Shan Yuqi)