What are the breakthroughs between this Winter Olympics and previous ones?

The Beijing Winter Olympics concluded successfully. During the 16-day competition, the Chinese delegation won 9 golds, 4 silvers and 2 bronzes, totaling 15 medals. Analysis: The number of gold medals ranks third among all participating delegations. Not only has it achieved a historic leap in the number of medals, but it has also achieved breakthroughs in the history of Winter Olympics participation in multiple events. The Chinese delegation participated in "all events" in this Winter Olympics, and many events participated for the first time. The athletes of the Chinese sports delegation used their tenacious fighting spirit to achieve "China's breakthrough in all events." Expansion: First of all, medals. Our country won 9 gold medals in one victory at this Winter Olympics, namely 1. The men’s snowboarding big platform was won by 17-year-old Su Yiming (now 18 years old) with a total score of 182.50 points. Winning the championship was also my country's first Olympic gold medal in snowboarding, and Su Yiming became the youngest Olympic champion in the history of this event. 2. Ren Ziwei won the men's 1000m short track speed skating event in 1 minute, 26 seconds and 768 seconds, marking my country's first Olympic gold medal in this event. 3. The short track speed skating mixed team 2000m relay team of Wu Dajing, Ren Ziwei, Qu Chunyu, Zhang Yuting and Fan Kexin successfully won the championship with a time of 2:37.348. This is not only our first gold medal in this Winter Olympics, It is also the first team in the history of the Winter Olympics to win the mixed relay championship. 4. Han Cong and Sui Wenjing won the figure skating pairs skating with a total score of 239.88 points over Russian skaters. They also set a new world record with a short program score of 84.41 points. This is also the first time since the 2010 Vancouver Winter Olympics. He won another Olympic gold medal in pairs skating 12 years later. 5. Gao Tingyu won the men's 500-meter speed skating event with a time of 34.32 seconds, breaking the Olympic record. This was also the first gold medal in men's speed skating since my country participated in the Winter Olympics in 1980. 6. Qi Guangpu won the men’s freestyle skiing aerials with a total score of 129 points, defeating Ukrainian players. As a veteran of four Winter Olympics, the 31-year-old finally realized his dream at home. This is also the first time in 16 years that our country has won the Olympic gold medal in this event. 7. Xu Mengtao won the women's freestyle skiing aerials with 108.61 points. This is also the first Olympic gold medal my country has won in this event in 24 years. As a veteran of four Winter Olympics dynasties, she finally realized her dream in Beijing and brought a successful end to her career. 8. Gu Ailing won the women's freestyle skiing U-shaped field skill with a score of 95.25, beating Canadian players. This is also my country's best result in this event. 9. The gold medal in the women's freestyle skiing platform was also won by our Gu Ailing. She successfully won the championship with a score of 188.25. This is also my country's first gold medal in the history of the Winter Olympics snow events.