Taiwan Solidarity Union candidate Liao Pen-yen was expected to claim some of Chang's vote share in 2001,[3] but both were elected to office.
[14][15] In March 2002, Chang criticized brokers that defrauded Taiwanese students who wished to pursue higher education in China.
[18] In October 2002, John Chang announced that 121 lawmakers had signed his petition advocating airline flights across the Taiwan Strait.
In June 2000, Chang asked the Control Yuan to investigate a former National Security Bureau official who visited China days after retirement.
[30] In October, Chang submitted evidence in a separate legal case implicating the NSB's Liu Kuan-chun, who was suspected of embezzling money from the agency.
[36][37][38] In April, Chang accused legislator Wang Chung-yu, former president of the Association of Industry for Environmental Protection ROC, of using the group's funds improperly.
[43] In December 2003, Chang called a press conference to present evidence that Pan Jung-kuang had joked about Chen Shui-bian while giving a lecture.