2015 – PresentBeijing Lung Tin Law FirmAttorney at Law and Patent Attorney  Conducted the patent invalidations for the mechanical, electrical and chemical fields. Conducted the patent administrative litigations for the mechanical, electrical and chemical fields. Conducted the patent infringement litigations for the mechanical and chemical fields. Conducted the simple trademark and copyright litigations. Conducted the patent infringement analysis and patent stability analysis. Conducted the patent administrative investigation and enforcement cases. Conducted the customer development and maintenance.2012 – 2015Wan Hui Da IP Agency Senior Patent Counsel Drafted the patent applications and responsed to the office actions. Reviewed the translation of the patent applications. Conducted the patent reexaminations and the patent invalidations. Conducted the patent administrative litigations. Conducted the patent infringement analysis and the patent stability analysis. Conducted the customer development and maintenance.2002 – 2012State Intellectual Property Office (SIPO)Deputy Director Conducted the management of task, quality, training, etc. Examined the patent applications in the field of Biotechnology. Examined the patent reexamination in the field of Biotechnology. Made the evaluation reports of the Utility Model patent. Trained the new examiner. Conducted the research projects.