Helan stone is not suitable for printing materials, it is too hard! The most suitable stones for seal carving include Qingtian stone, Balin stone, Shoushan stone, Chang stone, etc.
The best seal carving expert in Ningxia is Yang Hua, a member of Xiling Seal Society. Followed by Li Hongyi, Ma Jiahu, Dang Yingcai, etc.
If you need other information on seal cutting, please add 64993641