at KCON:TACT 2020 and held their first virtual meet-and-greet with fans. On July 4, Ateez released a promotional schedule for their fifth EP, Zero: Fever Part.1, their first release following the conclusion of the Treasure series. The lead single, "Inception", was voted by fans over the track "Thanxx". The EP was released on July 29, and Ateez received their third and fourth music program awards for "Inception" on August 4 and 5, on The Show and Show Champion. Music video of the other single, "Thanxx", was released on August 24. Zero: Fever Part. 1 sold 379,052 physical copies in South Korea in 2020, which was Ateez's first album to be certified platinum by the Korea Music Content Association, as well as making Ateez the second fourth-generation boy group to generate one million total sales as rookies. On August 29, Ateez appeared on the South Korean television program Immortal Songs: Singing the Legend. They performed a cover of Turbo's "The Black Cat Nero" and won the episode, making them the first fourth-generation group and the sixth idol group overall to win on the program. On October 31, Ateez released a special Halloween music video version of "The Black Cat Nero", featuring the original artist Kim Jong-kook. On November 15, it was announced that member Mingi would temporarily suspend promotional activities with the group in order to receive treatment for and recover from symptoms of psychological anxiety. At the 2020 Mnet Asian Music Awards, Ateez won the Worldwide Fans' Choice and Discovery of the Year awards. During their performance at the show, it was announced that they would be joining The Boyz and Stray Kids on the inaugural season of Kingdom: Legendary War, an Mnet competition show which aired in April 2021. On December 19, Ateez were the only idol group invited to the Immortal Songs year-end finale "King of Kings", where they performed their version of Seo Taiji and Boys' "Anyhow Song". According to an official Twitter survey, Ateez were the fifth most tweeted-about musician in the United States in 2020, after BTS, Kanye West, Beyoncé, and Drake, and the 10th most tweeted-about K-pop group in the world. 2021: Fever series, Kingdom and domestic promotions On January 31, Ateez received their first Bonsang (main award) since debut on the 30th Seoul Music Awards. They returned to Immortal Songs: Singing the Legend for a third time and won the episode on February