居大不易

Explanation: The Tang Dynasty poet Bai Gu in the name of fun. After living in the city metaphor, life is not easy to maintain. 　　Source: Tang Zhang solid "leisurely and carefree advocate": "White Book should be held, first in Beijing, books of poetry Ye Gu, Gu see the name, cooked as white duke said: 'the price of rice in your party, Home Front is also easy to'." 　　Examples: Although I am not afraid desolate, but if the purchase of food, to be run around a few years, is also ~ ear. ("To Lu Xun Xu Shouchang Letters")