[4][5][6][7] While in custody, he cooperated with the Federal Bureau of Investigation (FBI) and provided tapes that revealed how Taiwanese military intelligence directed the Bamboo Union to use violence against dissidents of the Kuomintang during martial law in Taiwan.

[13][14][15] Chang is credited with giving the Bamboo Union a political mission and a romantic character which has made it more appealing to gain members from rival criminal gangs.

[15] Upon his return to Taiwan, Chang opened a campaign headquarters affiliated with the "Chinese Unification Promotion Party" in downtown Tainan in order to prepare for elections in 2016.

[23] In one notable protest in February 2019, Chang tripped and stumbled into his own prop coffin that he had brought to symbolize Taiwanese fatalities that would result from resistance to invasion from the PRC.

[24] In August 2019, Chang was arrested by Taiwanese police and prosecutors charged him and five party workers with taking illicit political donations, embezzlement, and tax evasion.