Japanese Yuuka Hasumi, 17, and Ibuki Ito, 17, also from Japan, who want to become K-pop stars, perform during their street performance in Hongdae area of Seoul, South Korea, March 21, 2019. (Photo by Kim Hong-Ji/Reuters)

South Korean tightrope walker Nam Chang-dong performs “Jultage” or Tightrope walking during the traditional festival “Dano” at Namsan Hanok village in Seoul, South Korea, 14 June 2021. The festival falls on the fifth day of the fifth month of the lunar calendar. Only 30 audience members were allowed to attend the performance amid the coronavirus COVID-19 pandemic. (Photo by Jeon Heon-Kyun/EPA/EFE)

Dinosaur mockups are installed in Danghangpo, Goseong, some 466km southeast of Seoul, South Korea, 06 September 2021, 25 days ahead of the Gyeongnam Goseong Dinosaur World Expo 2021 set for 01 October until 07 November. Goseong is one of the world's three largest fossilized dinosaur footprint sites, along with Colorado in the United States and the west coast of Argentina. (Photo by Yonhap/EPA/EFE)

A South Korean soldier wear North Korea's military uniform, acting as North Korean soldier during an anti-terror and anti-chemical drill session held as part of the 2011 Ulchi Freedom Guardian (UFG) event on August 17, 2011 in Seoul, South Korea. The 11-day UGC, which features drills including the handling of chemical and biological attacks, is a regular joint exercise between US and South Korean troops to prepare for potential emergencies on the Korean Peninsula. (Photo by Chung Sung-Jun/Getty Images)

South Korean university students prepare for an establishment ceremony of the Reserve Officer Training Corps (ROTC) for female cadets at Sookmyung Women's University on December 10, 2010 in Seoul, South Korea. The South Korean defense ministry has agreed to admit women into it's college-based Reserve Officers' Training Program for the first time since the program began in 1963. (Photo by Chung Sung-Jun/Getty Images)

Hwang Bo-young (L), a North Korean defector who was a member of the North Korean National female ice hockey team, prepares for practice with South Korean teammates on March 13, 2006 in Seoul, South Korea. Young, 27-years-old, became a captain of the South Korean National Female Ice Hockey Team. (Photo by Chung Sung-Jun/Getty Images)

South Korean teenagers participate in a warfare exercise as part of the Special Warfare Command's training course at a military base on August 4, 2011 in Seoul, South Korea. About 1,000 civilian volunteers including middle and high school students participated in the special force's four-day training programme to develop their spiritual and physical strength. (Photo by Chung Sung-Jun/Getty Images)

“The Toyota Winglet is a self-balancing two-wheeled scooter similar in function and form to the Segway PT and the Honda U3-X. It is capable of cruising at 3.7 miles per hour. Unveiled August 1, 2008, it is not known when or if the Winglet will be offered for consumer sale”. – Wikipedia

Photo: A Toyota Motor employee displays a proyotype model of personal transport assistance robot “Winglet” during the 11th Eco-Products 2009 – Eco Style Fair at Tokyo Big Sight on December 10, 2009 in Tokyo, Japan. (Photo by Koichi Kamoshida/Getty Images)