Complex sentence: In 1997, Xi was named an alternate member of the 15th CPC Central Committee, and in 2002, a full member of the 16th CPC Central Committee, marking his ascension to the national stage.
Split into simpler sentences: In 1997, Xi was named an alternate member of the 15th Central Committee of the Communist Party of China. In 2002, Xi was elected a full member of the 16th Central Committee, marking his ascension to the national stage.