The China Institute of City Competitiveness, a Hong Kong-based research organization, has released a ranking of Chinese cities based on their clean index.

The ranking uses 21 detailed indexes in five major criteria, including a green index, a clean and tidy index of buildings, a clean index of living environment, a waste disposal index and a sanitary service index.

Hong Kong has become the cleanest city in China, with a total score of 89.3. Macao and Xiamen of Fujian Province rank the second and third respectively.

Let's take a look at the top 10 cleanest cities in China.

 Jincheng, Shanxi Province

Jincheng, Shanxi Province [File photo]

Total score: 79.31