How many blasting companies are there in Heilongjiang Province?

There are five blasting companies. Heilongjiang blasting companies include Harbin Hengguan Blasting Engineering Co., Ltd., Heilongjiang Deming Blasting Engineering Co., Ltd., Heilongjiang Julong Blasting Engineering Co., Ltd., Heilongjiang Jixing Blasting Demolition Engineering Co., Ltd. and Heilongjiang Ganyi Blasting Engineering Co., Ltd. Heilongjiang Blasting Company undertakes all kinds of blasting work such as mine blasting, demolition blasting, blasting supervision and silent blasting, as well as the design, construction and evaluation of demolition engineering.