In November 2003, Huang became the executive vice mayor of Tianjin, overseeing the economy and statistics collection. During his term as vice mayor, he was known for his cooperation with other city departments. In December 2007, he was named acting mayor of Tianjin, and confirmed a few months later by the municipal People's Congress, replacing
Dai Xianglong. In 2009, Huang oversaw the transformation of the districts of the Binhai region into the
Binhai New Area. In December 2014, Huang, after serving as mayor for some seven years, became the acting party chief of Tianjin, replacing
Sun Chunlan, who was transferred to work as head of the
United Front Work Department in Beijing. However, Huang was not confirmed as official party chief for unknown reasons. Under Huang, on April 21, 2015, Tianjin's first free trade experimental zone opened. Huang attended its inauguration. The trial of
Zhou Yongkang, the highest-ranked official to go on trial since the
Cultural Revolution, also took place in Tianjin between April and May 2015, under Huang's watch. The
2015 Tianjin explosions took place during Huang's tenure. Several days after the explosion, Huang was named head of the response committee. He told journalists that he "takes inescapable responsibility" for the incident as he was the main official in charge of Tianjin. He was among the finalists for the 2010
World Mayor prize. == Investigation ==