During 1925 and 1926, Cälil became an instructor of Orsk uyezd Komsomol cell, where he visited Tatar and Kazakh auls, agitating for Komsomol there. In 1926, he became the member of Orenburg governorate Komsomol committee. In 1927, Musa moved to Moscow, where he combined his study in the Moscow State University and job in Tatar-Bashkir section of the Central Committee of Komsomol. Cälil joined the All-Union Communist Party (b) in 1929, which was the same year that his second collection, "İptäşkä" (i.e. "To the Comrade"; Jaꞑalif: "Iptəşkə") was published. Living in Moscow, Cälil met Russian poets Zharov, Bezymensky, and Svetlov; Cälil also attended Vladimir Mayakovsky's performances. He entered the Moscow Association of Proletarian Writers; he became its third secretary and a leader of its Tatar section. By the end of the 1920s, lyricism appeared in Cälil's poetry.