Invited by professor Wang Shejiao，Central Washington University Professor.James Cook、Bloomsburg University of Pennsylvania Professor.Roberta Soltz, St. Olaf Colleg Vice-Professor Zhangxun led 14 doctoral students and undergraduate students from Central Washington University、Earlham College、Middlebury College、University of North Carolina at Asheville、New College of Florida、Tufts University、Emory & Henry College、Kenyon College、Bucknell University、Pomona College、University of California San diego colleges and universities of the United States arrived in Xi'an in July 1. 2010, to carry out cooper research with our teachers and students to.
  US National Science Foundation research project this cooperation belong Center and Central Washington University shared responsibility (2009 to 2011): an interim evaluation "in consultation with the collision of Western Development and the Loess Plateau of farmers and water policy". Four teachers and seven students participate in this collaborative research center of Chinese researchers total, as well as Northwestern University, a teacher, a graduate student and two teachers of Ningxia University. Students are divided into two sides of history, economics and water three teams, under the guidance of the instructor, first in Xi'an for a period of four days of data access and listen to the expert's report, and then on July 8 long arms went to Shaanxi, Gansu Zhenyuan, Qingyang, Guyuan, Pengyang and Yinchuan and other places for field trips and research. After 11 days of intense work, the project team collected a large number of historical documents including the Ming and local chronicles and archives, including, forming a rich record of the interview, to lay a solid foundation for further research work in July 20, the China-US cooperation in the investigation to a successful conclusion.