HONG KONG/NEW DELHI/SINGAPORE -- A theme has been trending on social media over the past week in Hong Kong, which has come increasingly under the watchful eye of Beijing after a national security law imposed on the territory last year.
"We made it from ICQ to MSN, from MSN to WhatsApp. It's not that hard to switch to another app!" The line refers to popular instant messaging tools that have come and gone over past 20 years.
