What does hanyu mean is china?

Hanyu (汉语) means "Chinese language" in Mandarin Chinese. It is the official language of the People's Republic of China, the Republic of China (Taiwan), and Singapore, and one of the official languages of the United Nations. Hanyu is a member of the Sino-Tibetan language family and is the world's most spoken language by number of native speakers, with over 1.1 billion native speakers.