Between 1943 and 1946, he served as the chief editor of the newspapers Yumruq, Ədəbiyyat səhifəsi (Literature page), and Qalaba, published in Tabriz.

After the dissolution of the Azerbaijani National Government, he emigrated to Azerbaijan, where he faced persecution and was repeatedly imprisoned and exiled due to his activities.

[16]After returning to Tabriz, he intensified his activities with figures such as Haji Mirza Ali Shabustari, Ismayil Shams, Mir Mehdi Etimad, and others under the leadership of the Azerbaijani Society.

[16] Due to persecution, Mohammad Biriya, along with Mirza Ali Shabustari, Ismayil Shams, and Mir Mehdi Etimad, was brought from Tabriz to Baku in 1942 by the Deputy Commissar of Internal Affairs of the Azerbaijan SSR, General Aghasalim Atakishiyev.

[19] In 1944, his poetry collection Ürək sözü (The Heart's Word) was published in Baku with a print run of 5,000 copies.

[26][15] On November 20, 1945, he was elected chairman of the Presidium of the Azerbaijan People's Congress, which convened at the Ark Theater in Tabriz.

[27][28] On December 12, 1945, after the establishment of the Azerbaijani National Government, Mohammad Biriya was appointed Minister of Culture and Education.

[29][30][31]Additionally, he became a member of the newly formed National Assembly and the board of the Azerbaijani Society of Poets and Writers.

[32] During his one-year tenure as Minister of Culture and Education, he ensured that school lessons were conducted in Azerbaijani Turkish, developed a new curriculum, and oversaw the preparation of textbooks.

[36] Alongside his ministerial duties, in 1946, Biriya taught literature at the newly established "Azerbaijan University."

[37]The Azerbaijani Society of Poets and Writers was founded with centers in Tabriz, Zanjan, Urmia, Ahar, Ardabil, and other cities.

While some suggested retreating to the Azerbaijan SSR to continue the struggle from there, Mohammad Biriya advocated for staying in the region and fighting against the invading army.

[48] Although Biriya and his comrades resisted the Iranian troops entering the city, they were outnumbered and forced to take refuge in the Soviet hospital in Tabriz.

[61][60] After an investigation lasting more than seven months, in August 1948, Mohammad Biriya was accused of harboring hostility towards the Soviet government and the democratic structure in Southern Azerbaijan, as well as of espionage activities with Americans in Tabriz and with Iran's consul general in Baku.

On December 31, 1950, he was sentenced to an additional 10 years of imprisonment by the camp court for conducting anti-Soviet propaganda among the prisoners.

[69] In this letter, he demanded the abandonment of the Cyrillic alphabet in favor of the Arabic script, the closure of Marxist-Leninist schools, the removal of statues of Marx, Engels, Lenin, and Stalin, the expulsion of Armenians from Azerbaijan, the release of exiled individuals, and the establishment of Sharia law in the country.

[2] In the 1930s, he started composing lyrical ghazals in Azerbaijani[82] and Persian and adopted the pen name "Biriya,"[83] meaning "sincere" or "truthful.

[9] Between 1941 and 1946, his poems opposing the Shah's regime and fascism, infused with patriotic fervor, circulated widely across Southern Azerbaijan.

[84] Notable works such as Bəlkə Qayıtdı Şahımız (Maybe Our Shah Returned), Ay Kişi Bayram Gəlir (Oh Man, the Holiday Is Coming), Binəva Kəndlinin Şikayəti (The Complaint of the Poor Peasant), Mən Öz Qanıma Qəltan Yaranmışam (I Am Wounded and Bathed in My Own Blood), and Hər Addımda Məzarı Var (Every Step Holds a Grave) were distributed as leaflets to the public.

[84] In 1941, along with a group of Southern Azerbaijani intellectuals,[8] Biriya was invited to Baku for 15 days, where his poems were published in the Kommunist newspaper.

[20] One of his notable works, Ürək Sözü (The Word of the Heart), was published in Baku with a print run of 5,000 copies.

[87] Following the establishment of the Azerbaijan National Government, Biriya expanded his literary work to include plays.

[89] The film focuses on the events leading up to the establishment of the Azerbaijan National Government in 1945–1946 and the processes that unfolded during its existence.

[90] Moldovan writer Boris Marian, who was exiled in the same labor camp as Biriya, wrote about him in his book Bir Taleyin Dönərgələri (The Twists of a Fate).

[91] In 1997, based on investigation materials preserved in the archives of the State Security Service, a book titled Hər Addımda Məzarım Var (At Every Step, There Is My Grave) was published.