Ma Haiping, born in 1986, is an assistant professor at Lanzhou Institute of Seismology, China Earthquake Administration (CEA). She was graduated with a Master's degree from Lanzhou Institute of Seismology, CEA in 2014. She is engaged in crustal deformation analysis. E- mail: lutmhp@163. com Corresponding author: Feng Jiangang, born in 1977, is associate research professor at Lanzhou Institute of Seismology, CEA. He was graduated with a Master's degree from the Lanzhou Institute of Seismology, CEA in 2005, and works on seismology and the application of digital seismic data. E-mail: fjgspring@163. com.