Complex sentence: In 1955 Lin was named to the Politburo; and, in 1958, Lin joined the Politburo Standing Committee Lee 172 and became one of China's vice-chairmen.
Split into simpler sentences: In 1955 Lin was named to the Politburo. In 1958 Lin joined the Politburo Standing Committee Lee 172 and became one of China's Vice-Chairmen.