HONG KONG — With each passing day, the boundary between Hong Kong and the rest of China fades faster.
The Chinese Communist Party is remaking this city, permeating its once vibrant, irreverent character with ever more overt signs of its authoritarian will. The very texture of daily life is under assault as Beijing molds Hong Kong into something more familiar, more docile.
Residents now swarm police hotlines with reports about disloyal neighbors or colleagues. Teachers have been told to imbue students with patriotic fervor through 48-volume book sets called “My Home Is in China.” Public libraries have removed dozens of books from circulation, including one about the Rev. Dr. Martin Luther King Jr. and Nelson Mandela.
Hong Kong had always been an improbability. It was a thriving metropolis on a spit of inhospitable land, an oasis of civil liberties under iron-fisted rule. A former…

