This is the 265th most frequent Chinese word.
习近平
Xi Jinping: The current leader of China, serving as the General Secretary of the Communist Party, President, and Chairman of the Central Military Commission.
In this sentence, '习近平' is used as a proper noun referring to a specific person.
习近平是中国的一位重要政治领导人。
Xi Jinping is an important political leader in China.
In this example, '习近平' is the possessor of the philosophies being studied.
许多人研究了习近平的治国理念。
Many people have studied Xi Jinping's governance philosophies.
Here, '习近平' functions as the subject related to the speech being mentioned in the news.