Далянь - лучший город в Китае по мнению Синьхуа.

Coastal city Dalian in Northeast China was selected as China's most suitable city for living, followed by Xiamen, also a coastal city, in East China's Fujian Province.

Following were Mianyang in Southwest China's Sichuan Province and the provincial capital Chengdu; Wuhan, provincial capital of Hubei; Hangzhou, capital of Zhejiang; Shanghai; Nanjing, provincial capital of Jiangsu Province; Qingdao in Shandong Province; and Chongqing Municipality.

А Циндао - все равно лучше.

UPDATE - а самые счастливые - шанхайцы. По крайней мере в сравнении с пекинцами и южанами (гуанчжоусцами?).
A recent survey shows Shanghai is the happiest place to live in among China's three biggest cities.
Residents in Beijing and Guangzhou polled by the Shanghai Urban Investigation Team under the local government also rated it as their preferred place to live in, according to Thursday's China Daily.
Forty-nine percent of those questioned in the three cities considered living in Shanghai the most comfortable, while 29 percent chose Beijing and 22 percent Guangzhou, said the survey.
Eighty-five percent of Shanghai locals feel happy with the city, while only half of Guangzhou citizens like their city. Seventy-nine percent of Beijing citizens are satisfied with the capital city of China.
http://english.eastday.com/eastday/englishedition/metro/userobject1ai1769976.html