BEIJING, July 14 (Xinhua) -- Northwest China's Xinjiang Uygur autonomous region has seen remarkable improvement in infrastructure building, with the highest number of civil airports in China, a white paper said on Wednesday.

The document, titled "Respecting and Protecting the Rights of All Ethnic Groups in Xinjiang," was released by the State Council Information Office.

A total of 22 civil airports have been completed and put into use in Xinjiang, the highest number among all provincial-level administrative units in China, said the white paper.