Maybe I am bias, and of course many others will point out other metropolis, but to me at Guangxi Province, the Green City, its capital Nanning, host excellent New Lunar Year festivities. 
From the balcony at my apartment I can watch a solid display of continious fireworks from sundown until past 1 am on New Year's eve.  And many other sponsored events like water fountain colorful music concerts, regional music groups, even a couple of softball games.