" Atom " Sirada Rungpibulsophit 16 year old studying Mathayom 5 at BangkokThonburi Demonstration school is showing excellent form to win the women's singles title in the 19^th  year in the youth badminton tournament in Portugal. It is another admirable work of the Thai badminton industry after young female badminton player who is number 5 in the U19 women's singles has done an excellent job. Wining the Women's Singles title XIII Portuguese Junior International 2021 and the Junior International Series event in Portugal.

"Atom" continued to perform well in the three-day competition that had to play twice a day, defeating opponents until reaching the final before defeating Sophia Nong from Canada 2-0 in 21-17, 21-11 to win the championship successfully. Earlier, "Atom" also won the women's singles title at the Victor Denmark Junior 2021 Badminton World Championships after beating 6th rank BillKis Prasista from Indonesia 2 games in a row 21-18 and 21-17 won the title. It was her first time to win the world youth badminton championship.

Also she received an award for outstanding sportsmanship from His Excellency General Prayut Chan-o-cha, Prime Minister on 16 December. And also received encouragement from Assoc. Prof. Dr. Bang-on Benjathikul, the founder of the Bangkokthonburi Demonstration School to be successful in the next tournament as well.