Brief introduction: CMGS is short for China Hunan (Chenzhou) International Mineral Gem Show which is an exclusive mineral gem trading platform of Hunan Province approved by the State Council, sponsored by the State Land and Resource Ministry and Hunan Government, as well as the largest professional mineral gem show of Asian under current situation. It was decided by Hunan Government in November, 2015 that the show would be fixed in Chenzhou city permanently from 2016. Till now, the 3rd and 4th shows have been handled out successfully by Chenzhou city. Chenzhou CGMS was once to be a hot searching topic of the internet that more than 30million entries were concerned about it.