Since practising as a lawyer, Zhang has focused on the legal services of the whole process of real estate and construction engineering projects, investment and financing as well as dispute resolution for a number of large state-owned enterprises and domestic construction engineering projects of overseas and domestic listed companies, such as Hubei Railway Construction Investment Group, Wuhan Xingang Construction Investment Development Group, Sino Ocean Real Estate and Synopsys. Zhang has also provided legal services for overseas investment and financing and construction engineering projects of Huaxin Cement Co., Ltd., a domestic listed company, in such counties as Tajikistan, Cambodia, Nepal and Mongolia.