Attendee: SHI Xin, LU Xiaoxu and XIAO Suyu (Vidyo)
Paper discussed:  
"Search for the invisible decay of J/ψ in ψ(2S)→π+π-J/ ψ"
10.1103/PhysRevLett.100.192001  
Proposal for next JC: 
One paper every two weeks. 
Week 1: paper survey, each member propose one paper (from top journal Nature, Science, PRL etc). At the end of week, choose one. 
Week 2: Read the paper, discuss at the end of week.