In addition to being deported, Li will also be banned from traveling to Taiwan for five years. "Our government will not tolerate any illegal activity that undermines democracy and freedom for evil purposes," the Taiwan Immigration Agency said in a statement.
Li is considered the first case of deportation from Taiwan regarding the Hong Kong protest, a move that could upset China.
Those protests Hong Kong has created the walls are covered with colorful pieces of paper, posters and slogans demonstrations across the city. They also created such walls in Taiwan, mostly on university campuses.
China always sees Taiwan as a territory waiting for unification. Relations between the two straits of the Taiwan Strait became tense after Thai Anh Van, who refused to recognize the "One China" policy, came to power in 2016.
Hong Kong has undergone 4 months of protests that have plunged Asian financial centers into crisis. The Taiwanese leader vowed to assist Hong Kong people at risk of being prosecuted for the protests. China criticized her actions, demanding that Taiwan "stop interfering" with Hong Kong issues.
Ms. Thai also warned on Tuesday that mainland Chinese who attack Hong Kong people or sabotage the walls will be banned from entering Taiwan .