October 5.
On 11/15, students from Grade Three in Gangu County, Wushan County, Qin 'an County, Qingshui County and Zhangjiachuan County returned to school.
Gangu County belongs to Tianshui City, Gansu Province, which is located in the southeast of Gansu Province, northwest of Tianshui City and upstream of Weihe River.