[3] On May 15, 2016 he held a protest near Macau Chief Executive Fernando Chui's house against the Macao Foundation's "black box" donation to Jinan University (Chief Executive Chui was also the chairman of the foundation's trust committee and the vice chairman of the university).

On 4 December, 2017, his fellow legislators passed (28 vs 4 votes) a motion to suspend Sou from the assembly so he could be prosecuted under Macau law.

As the conviction did not involve any jail time, he was then reinstated as a member of the Legislative Assembly on July 3, 2018.

[4] The Macau Daily Times ranked Sou as "Person of the Year" in 2017.

[5] By September 2021 the courts ruled he was not sufficiently loyal to the government and so was unable to keep his seat in the assembly.