The arrests of more than 50 democrats in Hong Kong last week intensifies a drive by Beijing to stifle any return of a populist challenge to Chinese rule and more measures are likely, according to two individuals with direct knowledge of China's plans.

While stressing that plans haven't been finalized, the individuals said it was possible that Hong Kong elections — already postponed until September on coronavirus grounds — could face reforms that one person said were aimed at reducing the influence of democrats.

Both individuals, who have extensive high-level experience in Hong Kong affairs and represent Beijing's interests, spoke on condition of anonymity.