In 2001, he backed Tainan County magistrate Mark Chen's decision to support Kueijen Township residents' protest of an Environmental Protection Administration plan to construct an industrial waste complex there.
[1] In 2003, Wu organized a demonstration at the Nanhua Reservoir, calling for the government to lift restrictions on development at the site while providing compensation for county residents.
[3] Shortly after Typhoon Morakot struck Taiwan in August 2009, Wu criticized the decision to build a water diversion tunnel through Mount Siandu.
[6][7] In March 2004, police alleged that Wu bet on the Taiwan Capitalization Weighted Stock Index, and won NT$50 million.
The pair were suspected of earning NT$1 billion in profit via Wu's Fu-hsin Company, which had begun dredging sand from the Tsengwen River in 2004.
[8][9] In the midst of the Tsengwen River case, Wu ran for reelection as Tainan County Council speaker and won in March 2006.
[11][12] In 2007, the Tainan District Prosecutors' Office began investigating Wu for gambling on Chinese Professional Baseball League (CPBL) games.
[1] In December 2011, Wu's appeal of the match fixing charges related to the 2007 probe led by the Tainan prosecutors was heard by the Taiwan High Court.
[33] On 6 February 2019, Criminal Investigation Bureau officers from Taiwan's National Police Agency flew to Manila to extradite Wu.