https://arstechnica.com/tech-policy/2020/07/hong-kong-downloads-of-signal-surge-as-residents-fear-crackdown/

The secure chat app Signal has become the most downloaded app in Hong Kong on both Apple's and Google's app stores, Bloomberg reports, citing data from App Annie. The surging interest in encrypted messaging comes days after the Chinese government in Beijing passed a new national security law that reduced Hong Kong's autonomy and could undermine its traditionally strong protections for civil liberties.

The 1997 handover of Hong Kong from the United Kingdom to China came with a promise that China would respect Hong Kong's autonomy for 50 years following the handover. Under the terms of that deal, Hong Kong residents should have continued to enjoy greater freedom than people on the mainland until 2047. But recently, the mainland government has appeared to renege on that deal.