(Minghui.org) Twenty years ago this May, Master Li Hongzhi first introduced Falun Dafa to the public in Changchun, China. Falun Dafa has since spread around the world. An estimated more than 100 million practitioners have been following the principles of Truthfulness-Compassion-Forbearance and have benefited in both mind and body. For the past 13 years, every May 13, Falun Dafa practitioners around the world have sent greeting cards to Minghui.org to celebrate World Falun Dafa Day and wish revered Master a happy birthday. The following are some of the greeting cards sent by practitioners who are illegally held in the Chinese Communist Party's prisons. Although imprisoned, they still remain steadfast for their belief in Master and Dafa.

Practitioners Who Are Illegally Held in Hongzehu Prison Respectfully Wish Revered Master Happy Birthday!

Practitioners Who Are Illegally Held in Liaoning Province Women's Prison Celebrate the 20th Anniversary of Falun Dafa's Public Introduction!

Practitioners Who Are Illegally Held in Xinxiang City Women's Prison in Henan Province Celebrate World Falun Dafa Day!

Practitioners Who Are Illegally Held in Chaoyanggou Forced Labor Camp in Jilin Province Respectfully Wish Master Happy Birthday! Celebrating World Falun Dafa Day and the 20th Anniversary of Falun Dafa's Public Introduction!

Practitioners from Jilin Province Who Are Illegally Detained Respectfully Wish Master Happy Birthday! Celebrating World Falun Dafa Day and the 20th Anniversary of Falun Dafa's Public Introduction!

Practitioners from Tangyuan Who Are Illegally Held in Harbin Women's Prison in Heilongjiang Province Respectfully Wish Revered Master Happy Birthday!

Practitioners from Taiyuan City, on Behalf of Practitioners Who Are Illegally Held in Taiyuan City Detention Center and Shanxi Province Women's Prison, Respectfully Wish Compassionate Great Master Happy Birthday! Celebrating World Falun Dafa Day and the 20th Anniversary of Falun Dafa's Public Introduction!

Practitioners, on Behalf of Practitioners Who Are Illegally Held in a Prison in Beijing, Respectfully Wish Master Happy Birthday and Celebrate World Falun Dafa Day!

Practitioners from Shanghai Who Are Illegally Detained Respectfully Wish Revered Master Happy Birthday and Celebrate the 20th Anniversary of Falun Dafa's Public Introduction!

Practitioners from Dalian, Liaoning Province, Who Are Illegally Detained, Who Live Away from Home to Avoid the Persecution, and Who Are Deprived of Freedom Respectfully Wish Compassionate Great Master Happy Birthday! Celebrating World Falun Dafa Day and the 20th Anniversary of Falun Dafa's Public Introduction!

Disciples miss Master, and we are even more looking forward to seeing revered Master return to China. We will study the Fa more, look within, and rectify our every single word and action with Dafa's principles. We will do well the three things that revered Master told us to do, fulfill our vows, and live up to the expectations of sentient beings.

Practitioners Who Are Illegally Held in Weinan Prison, Shaanxi Province, Respectfully Wish Compassionate Great Master Happy Birthday and Celebrate the 20th Anniversary of Falun Dafa's Public Introduction!

Practitioners Who Are Illegally Held in the Following Prisons, Forced Labor Camps and Detention Centers Respectfully Wish Compassionate Great Master Happy Birthday! Celebrating World Falun Dafa Day and the 20th Anniversary of Falun Dafa's Public Introduction!

Shaanxi Province Women's Prison

Shaanxi Province Women's Forced Labor Camp

Guo Town Forced Labor Camp in Baoji City, Shaanxi Province

Xi'an City Brainwashing Center in Shaanxi Province

Detention Centers and Custodial Centers in Shaanxi Province

Hebei Province Women's Prison

Hebei Province Women's Forced Labor Camp

Shijiazhuang Prison in Hebei Province

On Behalf of Two Practitioners from Qitaihe City Who Are Illegally Held in Jiamusi Prison in Heilongjiang Province, We Respectfully Wish Master Happy Birthday!

On Behalf of a Practitioner from Qitaihe City Who Is Illegally Held in Harbin Women's Prison in Heilongjiang Province, We Respectfully Wish Compassionate Great Master Happy Birthday!

Practitioners from Weifang Who Are Illegally Held in Shandong Province Women's Prison Respectfully Wish Compassionate Great Master Happy Birthday!

Practitioners from Hanzhou, Sichuan Province, and Practitioners Who Are Illegally Imprisoned Respectfully Wish Compassionate Great Master Happy Birthday!

Practitioners from Aohan Banner Who Are Illegally Held in Chifeng No.4 Prison in Inner Mongolia Respectfully Wish Master Happy Birthday and Celebrate World Falun Dafa Day!