As a Special Administrative Region of China, Hong Kong has long enjoyed greater autonomy than the mainland, allowing its independent Chinese-language publishing industry to flourish.

A Hong Kong bookshop raided by national security police this month announced on Wednesday that it would close after 50 years in business, while another shut down ahead of schedule.

As a Special Administrative Region of China, Hong Kong has long enjoyed greater autonomy than the mainland, allowing its independent Chinese-language publishing industry to…