Samdup, 41, from Gonchok village, Serthar (Ch: Seda) County, was sentenced to 8 years in prison. He was arbitrarily detained on 5 April 2021 and remained a victim of enforced disappearance till his sentencing. On 13 June 2012, he was arrested by the police in Serthar County, Sichuan Province, on suspicion of "engaging in political activities opposing the Chinese Communist Party's rule in Tibet."

He was later formally arrested by the local prosecutor's office, and charged with participating in the "Tibetan resistance movement" and actively establishing an "anti-Red resistance organization," which, according to authorities, violated national laws and regulations. On 1 August 2013, He was sentenced to five years in prison by the Nyagchu People's Court.

Though he was released on 19 August 2016, he was detained again on 18 September 2016 and remained in detention for 17 days.