Lai, 78, was sentenced Monday under a Beijing-imposed national security law to 20 years in prison, the longest such sentence so far. His co-defendants, six other former Apple Daily journalists, received jail terms ranging between six years and nine months and 10 years.

Jimmy Lai, Hong Kong's pro-democracy media tycoon, has been jailed for 20 years for colluding with foreign forces under the city's controversial national security law.

This white paper was released by China's State Council, or cabinet, a day after a Hong Kong court sentenced leading China critic and former media mogul Jimmy Lai to 20 years imprisonment in a landmark...