Qinhuangdao TongHai Science & Technology Development Corporation (The department of technology development, Qinhuangdao Invention Association) is a development organization which studying specialized patent, pursue the policy "face market, face factory", put stress on industrializing scientific achievements, design and create many apparatuses for factory.

Since ten years ago, TongHai Co. Gain enterprise trust depended on a solid job, a rigorous scientific attitude and an honest credit. TongHai Company is one of the first research department developing vacuum frying technology in China. It has taken near ten years to research at a high starting point in constancy with high investments. The Continuous Vacuum Frying Line, which holds a quite high performance price rate, can process tens of variety material and has realized mature industrialized production. We have applied for Chinese patent and will apply foreign patents soon.