Abstract: After the foundation of the People's Republic of China,the Three generation Leader Groups of the Communist Party of China made long term and continuous efforts in order to solve Taiwan problem and achieve the unity of motherland. “Liberating Taiwan by force” in early 1950,“Liberating Taiwan Peacely”in middle 1950s,“One country,two systems” in 1980s and “Eight Policies” in 1990s,all of them embody completely the winding experience of the Three generation Leader Groups' probing in the process of unity of t...