Carrie Lam Cheng Yuet-ngor writes 'one country, two systems' has been at the heart of the SAR's success in the past 20 years and will continue to power its prosperity over the next 20 years and more

The Hong Kong Special Administrative Region turned 20 yesterday. It was a memorable day, not just for Hong Kong but for our entire country.

Hong Kong's "one country, two systems" framework has been at the heart of our success these past 20 years and it will power Hong Kong's prosperity over the next 20 years and more.