How many women surnamed Zhang are there in Dazhai Village, Languan Town, Lantian County, who are over 70 years old?

Dazhai Township is located in the middle of Lantian County, on the south bank of the Bahe River, 2 kilometers away from the county seat. In the early days of the founding of the People's Republic of China, it was called Yashan Township. Tianma Commune was built in 1958 and renamed Yashan Commune in the same year. In 1960, it moved to a new location and was changed to Dazhai Commune. In 1984, it was changed to a township. In 1996, it had an area of ??48 square kilometers and a population of 29,000. It governed Dazhai, Fenglinzhai, Xujiashan, Jiangjiazhai, Xinzhai, Zhangzhai, Jiahetan, Hujiaxiang, Geta, Linjiahe, and Chenhe. , Hutuo, Wenliupo, Yulin, Xuanbao, Wangcun, Huanggou, Taoyuhe, Leijiawan, Xuejiacun, Wangcungou, Podi, Huoshaozhai, Yingshang and Lezhai 25 administrative villages.