South Korea's short track speed skaters have already set down a huge marker for the Beijing 2022 Winter Olympic Games, winning gold and silver in both the Lausanne 2020 Winter Youth Olympic men's and women's 1,000 metres.
It was the first short track medal to be decided at Lausanne skating arena.
The South Koreans have a tremendous tradition in the sport, which was continued when Seo Whi-min was a convincing victor in the women's race in a time of 1min 29.439sec.
"I was really nervous, but having my friend in the final helped," Seo said.
She had made an early burst with Kim Chan-seo to hit the front, and the pair controlled proceedings from then on.
Canada's Florence Brunelle did her best to stay in touch, but could not pass the two Koreans.
Kim's time of 1:29.538 earned her silver, while Brunelle clocked 1:30.024 for bronze.
In the men's race it was a similar story.
Jang Sung-woo took gold in 1:33.531 ahead of silver medallist Lee Jeong-min (1:33.646).
The bronze medal went to Lee Kongchao of China (1:33.851).
Lee and Jonathan So of the United States had both been alive to the danger posed by the Koreans.
They exchanged the lead in the early stages, but the Koreans bided their time and struck out for gold at the strategic moment.
"We are from the same country, but we always compete hard against each other," Jang said.
They will hope to emulate Lim Ho-Jyun, who won gold at the first Winter Youth Olympics before topping the podium at Pyeongchang 2018.