1 | Conclusion: There is a difference of trace elements between children of different ages in Anning District of Lanzhou City. | |
2 | Based on the Anning district Lanzhou city as an example, we focus on the sustainable development of the county administrative planning problems. | |
3 | Tianfusagong in Lanzhou City is the landscape of Danxia physiognomy with a golden future in tourism development. | |
4 | The institute is located in Anning District of Lanzhou, the capital and political, economic and logistic centre of Gansu province. The district is the centre of science education in Lanzhou. |