Zheng has been focusing on tax legal services for 12 years. He has provided perennial legal services for the Ministry of Finance in Hubei Supervision Bureau, Hubei Provincial Tax Service, Hongshan District Tax Service of Wuhan City, Huangpi District Tax Service of Wuhan City and other agencies, and has represented clients in cases regarding tax reconsideration, tax litigation and tax-related criminal affairs. In addition, he participated in the compilation of Comments on Typical Tax Inspection Cases (published by the Law Press) and published two papers. His clients include without limitation to the Ministry of Finance in Hubei Supervision Bureau, Hubei Provincial Tax Service, Hongshan District Tax Service of Wuhan City, Huangpi District Tax Service of Wuhan City, China Gezhouba Group Co., Ltd., Poly Development (Wuhan) Co., Ltd., Yulong Group, Greentown (Wuhan) Co., Ltd., Vanke Real Estate (Wuhan) Co., Ltd., Hubei Townsite Holdings, Wuhan Wandun Cold Storage Logistics Company, Wuhan Financial Leasing and Hubei Yule Co., Ltd.