Mr. Yin is mainly engaged in patent agency work in the fields of biology and chemistry, involving fields such as pharmaceutical chemistry, biotechnology, organic chemistry, chemical engineering and processes. Familiar with patent laws and practical operations in multiple countries and regions, and has helped a large number of domestic and foreign applicants obtain patent rights in multiple countries and regions around the world.

In addition, Mr. Yin has also handled multiple patent invalidation and litigation cases, such as the Liraglutide Formulation case, the Gliclave Crystal case, and the Glucoamylase series invalidation case, which are all influential cases in the industry.