CHPTL is the only applicant in China who is interested in joining STL and has already submitted an application for STL membership. XIHARI is one of the member laboratories of CHPTL in this application, and also serves as the secretariat of CHPTL.

XIHARI has been representing CHPTL in the daily activities of the STL Technical Committee for many years, including but not limited to participating in technical working groups, attending annual TC meetings, submitting technical proposals, and participating in international comparative technology activities.