Night panorama of Hong Kong (China) online puzzle
Hong Kong is a special administrative region of China. This great port city belonged to Great Britain for over 150 years and at the end of the 20th century it returned to China as an autonomous entity. Hong Kong is one of the most important cities of the Middle Kingdom and the world's largest metropolis. It is an important center of commerce, industry as well as one of the financial centers of the country, known primarily for its modern buildings. However, the city struggles with the problem of smog that envelops it in dense fog. Every day Hong Kong residents use applications to measure air quality and they often alter their plans depending on its results. When air pollution exceeds an acceptable level, it is better not to go out without the need.