For　group　signatures　(GS)　supporting　membership　revocation,　verifier-local　revocation　(VLR)　mechanism　is　the　most　flexible　choice.　As　a　post-quantum　secure　cryptographic　counterpart　of　classical　schemes,　the　first　dynamic　GS-VLR　scheme　over　lattices　was　put　forward　by　Langlois　et　al.　at　PKC　2014;　furthermore,　a　corrected　version　was　shown　at　TCS　2018.　However,　both　designs　are　within　Bonsai　trees　and　featuring　bit-sizes　of　group　public-key　and　member　secret　signing　key　proportional　to　log　N　where　N　is　the　group　size;　therefore,　both　schemes　are　not　suitable　for　a　large　group.　In　this　paper,　we　provide　an　improved　dynamic　GS-VLR　over　lattices,　which　is　efficient　by　eliminating　a　Olog　N　factor　for　both　sizes.　To　realize　the　goal,　we　adopt　a　more　efficient　and　compact　identity-encoding　technique.　At　the　heart　of　our　new　construction　is　a　new　Stern-type　statistical　zero-knowledge　argument　of　knowledge　protocol　which　may　be　of　some　independent　cryptographic　interest.　©　2021　Yanhua　Zhang　et　al.