Beijing, China, July 26th - July 9, 2013, the second "Beijing Rare Gas Mass Spectrometry User Association" hosted by Thermo Fisher Scientific (hereinafter referred to as "Simo") was successfully held at Shangri-La Hotel, Beijing. The conference showed the latest developments, technologies and application cases of multi-receiving rare gas mass spectrometry to users across the country. Nearly 30 domestic user representatives from the Chinese Academy of Sciences, the Chinese Academy of Geological Sciences, the China Academy of Engineering Physics, the China Earthquake Administration and a number of universities attended the conference.