In lesson 4 of the Dual Olympic Chinese Series Courses Cheer for Beijing's Dual Olympics, we introduce some bright points of the 2022 Beijing Winter Olympics, such as some cool technologies of ice making technology of Ice Ribbon, metal-awarding robot, and so on. These cool technologies make the Beijing Winter Olympics more exciting. At the Knowledge Station, you will also learn the knowledge related to the 2008 Beijing Summer Olympic Games and 2022 Beijing Winter Olympic Games, such as the time and place of the opening and closing ceremony, the competition area and venues, as well as the mascots of Beijing's Dual Olympics.