As one of the largest firms in western China, Zhonghao Law Firm's IP practice derives from its corporate and commercial business. The firm is often called upon in contentious work, particularly in copyright disputes and internet infringement cases. Headquartered in Chongqing, home of a lot of China's manufacturing, infringement claims over design patents form a large part of the firm's work. Since 2004, it has maintained a strategic relationship with So Keung Yip & Sin in Hong Kong.