There are five business leaders Xiao Zhang, Xiao Wang, Xiao Zhao, Xiao Ding, and Xiao Li in a unit who participated in a skills test. Their test results were as follows: Xiao Zhao did not have Xiao Li Gao, Xiao Zhang did not have Xiao Wang Gao, Xiao Ding No less than Xiao Li, and Xiao Wang is not as high as Xiao Zhao,. Excuse me, who has the highest test scores, Xiao Zhang, Xiao Wang, Xiao Zhao, Xiao Ding, and Xiao Li? ['Xiaoding.', 'Xiao Wang.', 'Xiao Zhao.', 'Xiao Zhang.']