Many farmers in Liu's home district raise pigs. To help them, he has spoken out against "free economic pilot zones" that he believe hurts Taiwan's agricultural sector. Liu has repeatedly attempted to amend environmental laws in Taiwan. His proposed changes include developing a system to track pollutant emissions, and asking the
Environmental Protection Administration to specifically track air quality in high-risk areas, such as in temples in which incense is burned. Liu has specifically focused on passing legislation related to harmful
particulates in the air. He has also participated in environmental protests, and have provided a platform for environmental groups to criticize industrial companies such as Formosa Petrochemical Corporation. On the subject of
United States beef imports in Taiwan, Liu repeatedly stated throughout his first term in office that he is against the use of
ractopamine in animal feed and does not wish for the government to lift the ban on ractopamine by executive order, but only by legislative consent. In 2012, he suggested that military personnel switch to eating pork instead of beef due to the ractopamine issue, a stance that was ridiculed online and which the military described as excessive. ==Personal life==