ㄕㄡˇㄕㄢˋㄑㄩshǒushànzhīqū

首善之区
  1. 漢書:教化京師。」最好)​首善之區首都

the finest place in the nation (often used in reference to the capital city)​, also written 首善之地[shou3 shan4 zhi1 di4]