Kūnmíng sìjì-rúchūn, suǒyǐ rénmen jiào tā Chūnchéng.
Kunming is like spring all year round, so it's called the Spring City.
Tips
usage
Capitalized, 春城 is Kunming's nickname, for its mild weather all year. In classical poetry it simply means a city in spring, as in Han Hong's line 春城无处不飞花, where the city is Tang Chang'an.
culture
Many Chinese cities have nicknames like this: 山城 'Mountain City' for Chongqing, 泉城 'City of Springs' for Jinan, 羊城 'City of Rams' for Guangzhou and 冰城 'Ice City' for Harbin.
