Original title: The difference between the "two items" of the Winter Olympics

　　In the Winter Olympics, there are Nordic Biathlon and Biathlon competitions, both of which are "biathlon". What are the differences between them?

　　The Nordic Biathlon consists of cross-country skiing and ski jumping. It is the only event in the Winter Olympics that only has men's competitions. It requires athletes to have the ability to quickly cross-country and also have outstanding jumping ability. The Nordic two items in the Winter Olympics are first compared to platform jumping and then to skiing, with a gap of 2 to 3 hours. The Nordic Biathlon of the Beijing Winter Olympics was held in Zhangjiakou, and a total of 3 gold medals were produced, namely individual ski jumping standard/cross-country ski 10km, individual ski jumping/cross-country ski 10km, and group ski jumping/ Cross-country skiing 4×5 km relay.

　　The rules of ski jumping and cross-country skiing competitions are the same as those of individual events, and all cross-country skiing adopts free technique. Individual competitions are conducted in ski jumping competitions according to the draw and the order of points. The scores will determine the starting order and interval of the cross-country skiing competition. The start will be delayed by 4 seconds for each point behind, and the ranking will be arranged in the order of reaching the finish line. In the team competition, each team has 4 players who wear red, green, yellow, and blue bibs according to the order of appearance. They cannot be changed. The competition is first compared to ski jumping and then cross-country skiing. Cross-country skiing is held in a relay race. The first athlete starts in the same order. The interval is determined by the total score of the ski jumping team. The start is delayed by 1.33 seconds for every 1 minute behind. The second, third, and fourth athletes wait in the relay area and start again after a successful handover. The result of the fourth athlete at the finish determines the ranking of each team, and the first comer wins the championship.

　　Biathlon is derived from the military training subjects of the Nordic Middle Ages. One of the characteristics of this project is to insert 2 to 4 shots in the fierce skiing competition to test the player's ability to convert between movement and static.

　　The Beijing Winter Olympics Biathlon has 11 small events. The men’s events include 20 kilometers individual, 10 kilometers short distance, 12.5 kilometers chase, 15 kilometers group start, and 4×7.5 kilometers relay; women’s events include 15 kilometers individual and 7.5 kilometers short. Distance, 10km chase, 12.5km collective start, 4×6km relay and mixed relay competition of women's 2×6km relay + men's 2×7.5km relay.