Attorney Guo Chongshan practices in the areas of corporate investment and mergers and acquisitions, cross-border investment and trade, dispute resolution, intellectual property, etc. Attorney Guo is a lawyer specializing in foreign-related legal services of the Yunnan Lawyers Association, a member of the South Asia and Southeast Asia Legal Services Professional Committee of the Kunming Lawyers Association, a member of the Free Trade Zone Legal Services Professional Committee of the Kunming Lawyers Association, a corporate compliance officer, and a member of the editorial committee of the "Applicable Interpretation of <Evaluation of the Effectiveness of Compliance Management of Small and Medium Enterprises>".

Some of the clients for whom Attorney Guo provides legal services to the government include: Yunnan Provincial Department of Commerce, Yunnan Provincial Forestry and Grassland Bureau, etc. Corporate clients to whom Attorney Guo has provided long-term legal services include but are not limited to: Yunnan State-owned Financial Capital Holding Group Co., Ltd., Yunnan State-owned Financial Capital Investment Management Co., Ltd., Yunnan Transportation Investment and Construction Group Co., Ltd., Yunnan Tourism Automobile Maintenance Co., Ltd., Xingyao Group, Yunnan Koshida New Materials Co., Ltd., etc.

Lawyer Guo’s experience in foreign-related legal service projects mainly includes: providing legal services for domestic clients investing in Myanmar refinery projects, providing full legal services for domestic clients investing in Myanmar glass factories; providing special legal services for industrial hemp legal consultation for US PE clients; participating in business negotiations, reviewing and drafting relevant legal documents for clients, involving Singapore steel trade enterprise cooperation projects, Southeast Asian entertainment project mother fund LP, Malaysia e-commerce projects, Myanmar golf course projects, Yangon Auto City projects, etc.

Lawyer Guo has participated in the compilation of books or articles mainly: 1. "Interpretation of the Application of "Evaluation of the Effectiveness of Compliance Management System for Small and Medium Enterprises", editorial committee member; 2. "The Difference and Connection between Internal Control and Risk Management" [J]. Chinese and Foreign Entrepreneurs, 2021 (27): 139-140. 3. WeChat article: "Things about Cross-border E-commerce Retail Import".