Harbin Dongan Building Sheets Co., Ltd. is a modern enterprise specializing in the building in large cold room 、steel structure factory building、 container room production area. We have been engaged in the production and R&D for 50 years. We have passed quality certifications from multiple authoritative institutions such as ISO9001 certific

In the annals of contemporary science, couple figures loom as large as Claude Elwood Shannon. Often hailed because the "father of information theory," Shannon's groundbreaking function laid the mathematical foundations with the electronic revolution that powers our globe nowadays. From the smartphones inside our pockets to the worldwide Online, muc