In 19-21, a United Group's Accounts Receivable Risk Management and Legal Collection of a Guyuan vs a Ten Metallurgical Sales Contract Dispute Case of a Hao Da vs a Hui Waterfront Sales Contract Dispute Case of a Rong Concrete vs a Chinese Labor Service and a Rong Series Contract Dispute Case of a Construction Concrete vs a Fast Company and Other Recourse Dispute Case of a Ocean vs Liu Wei Labor Dispute Case of a Degree vs a Degree of Infringing on Microelectronics Unfair Competition Dispute of a Dowell patent Dispute Case A Sper vs Guangdong A Far Infringement of Invention Patent Dispute Yang Mouhai vs Jiasheng Da Infringement of Design Patent Dispute