[6] In 2006, he was counsel for the blind civil rights activist Chen Guangcheng, who was sentenced to four years and three months in prison.

[3] In 2011, Teng met with other lawyers on 16 February to talk about the case of Chen Guangcheng, who was placed under house arrest after his release from prison.

[7] Teng was arrested on 20 February, the first Sunday of the 2011 Chinese pro-democracy protests that were inspired by the Arab Spring.

[10] From 2017 to 2018, Teng suffered a series of personal attacks from Chinese businessman Guo Wengui.

[11] Teng wrote an article afterwards to refute the related slander and rumors, and commented on the performance and impact of the "Guo Wengui incident".