At the north end of Dazhong Lane. You go to Zhangye Road Pedestrian Street, and then walk north along Dazhong Lane 100 meters.
If you want to find Lanzhou Children's Welfare Institute, it's in Datan, Qilihe District.
Take bus 127 and get off at Tiantai Auto Parts Station, then walk 500 meters west along Nanbinhe Road.
If starting from Xigu, take bus No.68 and get off at the terminal "Minxing Building Materials City", then walk 200 meters east along Nanbinhe Road.