north latitude
7.As for question 1, we set up a model by range estimation and picture work, and we calculate time 1 and time 2 flying across the North Pole in two different routes. We concluded that the flight time of crossing the North Pole starting from Beijing (taking 40 degree north latitude, and 116 degree east longitude) and landing at Detroit (taking 43 degree north latitude, 83 degree east longitude) is 4.0504 hours shorter.
10.Haixi Bay is a wind protected unfrozen deep harbor with good geological structure at north latitude 35-36°, neighbouring to Qingdao port which is one of the largest sea ports along the west coast of Pacific Ocean, while the Ship-building and Repair Base in Haixi Bay is an important part of China state long-term ship industry development planning.
