Qujing (Chinese: 曲靖; pinyin: Qǔjìng) is a prefecture-level city in the east of Yunnan province, China, bordering Guizhou province to the east and the Guangxi Zhuang Autonomous Region to the southeast; thus, it was called "Key between Yunnan and Guizhou" (滇黔锁钥) and "Throat of Yunnan" (云南咽喉) in the past. It is part of the Central Yunnan Metropolitan Region plan (滇中城市群规划) in effect for 2016–49.[4] Its administrative population is 6,047,000 according to a 2015 estimate, of whom, 1,408,500 reside in the metro area, which contains Qilin District, Zhanyi District and Malong District. During the 11th National Five-Year Plan period, the government of Qujing planned to develop the city into the "big city at the origin of the Pearl River" (珠江源大城市) in the following decades, including increasing the built-up urban area to past 100 km2 (39 sq mi) and the urban population to surpass 1 million by 2020, the second in Yunnan, after Kunming.[5] Qujing is located in the east of Yunnan province, about 130 kilometres (81 mi) east of Kunming, the provincial capital. Like much of the central and eastern parts of the province, it is part of the Yunnan-Guizhou Plateau. Tempered by the low latitude and moderate elevation, Qujing has a mild subtropical highland climate (Köppen Cwb), with short, mild, dry winters, and warm, rainy summers. Frost may occur in winter but the days still generally warm up to around 15 °C (59 °F). During summer, a majority of the days features some rainfall, and daytime temperatures rise to 25 °C (77 °F). A great majority of the year's rainfall occurs from June to October.