YINCHUAN, China — In China’s northwest, the government is stripping the most overt expressions of the Islamic faith from a picturesque valley where most residents are devout Muslims. The authorities have destroyed domes and minarets on mosques, including one in a small village near Linxia, a city known as “Little Mecca.”

Similar demolitions have been carried out in Inner Mongolia, Henan and Ningxia, the homeland of China’s largest Muslim ethnic minority, the Hui. In the southern province of Yunnan, three mosques were closed. From Beijing to Ningxia, officials have banned the public use of Arabic script.

This campaign represents the newest front in the Chinese Communist Party’s sweeping rollback of individual religious freedoms, after decades of relative openness that allowed more moderate forms of Islam to blossom. The harsh crackdown on Muslims that began with the Uighurs in Xinjiang is spreading to more regions and more groups.