The white paper on the practice of the "one country, two systems" policy in Hong Kong, released by the State Council recently, made a comprehensive review of Hong Kong's progress since the handover in its efforts to expand its external ties and gain a competitive edge in the world.

Hong Kong, known as the "Pearl of the East", is a world city of prosperity. One could hardly imagine what happened here 70 years ago, when the city was ravaged by war. Hong Kong was under Japanese invasion and occupation for three years and eight months, during Japan's war on the region.