"Ji Lao, on this raw material?" He Tian thought of this problem, naturally, the leader can not ignore this problem. Even that's the real key part.

"In addition to the list I gave you, there are three other raw materials, the first one, ink! Carbon ink. Purification in coal mines, a meal can be purified out of ten kilograms! The technology in this field is perfect and mature. The second is ice, but not ordinary ice, but naturally cold ice. Antarctic and Arctic. Thirdly, this is the key to really limit the number of refined liquid products, which requires a material called Minghuang! As far as I know, this kind...