Mainland authorities have revoked the licence of a lawyer who was engaged by the family of one of the 12 Hongkongers arrested and detained in Shenzhen while allegedly trying to flee to Taiwan.
Ren Quanniu was appointed by the relatives of Wong Wai-yin, but was barred from representing him in court.
Authorities say Ren's disqualification is in relation to another sensitive case he took up in 2018, in which he represented a member of Falun Gong, which is banned on the mainland.
Ren was allowed to state his case during a hearing, but the justice department of Henan province rejected his testimony.
The department ruled that by representing the Falun Gong member, Ren had repeatedly defended a cult, and had committed misconduct which prevented criminal proceedings from being carried out.
Ren said he would lodge an appeal against the disqualification.
The lawyer had also recently represented Zhang Zhan, a citizen journalist sentenced to four years in prison for her reporting on the coronavirus outbreak in Wuhan.
Authorities last month revoked the licence of Lu Siwei, another mainland human rights lawyer who was hired by relatives of the 12 Hongkongers, just days after the courts jailed 10 of them for illegally crossing the border.