20 13. Mianyang is a prefecture-level city under the jurisdiction of Sichuan Province, China Science and Technology City, the second largest economy in Sichuan, and a regional central city of Chengdu-Chongqing urban agglomeration. Mianyang Mid-Levels Blue Bay 20 13 delivery. Mid-Levels Blue Bay is a project developed by Mianyang Xincheng Real Estate Development Co., Ltd., with a total area of 350.42 mu, a total construction area of170668m2, an ultra-high greening rate of 50.3%, an ultra-low building density of 19.3% and an ultra-low floor area ratio of 0.73.