They were greeted in front of the Tree-Revolution Exhibition House by Ri Man Gon, vice-chairman of the Central Committee of the Workers' Party of Korea, and other officials of the Party Central Committee.

Along the routes of streets Pyongyangites gave warm welcome to the contributors, waving flags of the DPRK, red flags and bouquets.

The contributors visited the statues of President Kim Il Sung and leader Kim Jong Il on Mansu Hill to make a report about their success and vow to successfully conclude their research and development campaign to attain the final-phase goals for perfecting the state nuclear force advanced at the Seventh Congress of the Workers' Party of Korea, true to the guidance of respected Supreme Leader Kim Jong Un.