C980 How about Satellite Navigation

Prof. Lin had been waiting for Qin Guan, because he had received orders from the navy that President Qin would solve the problem of precise navigation. He had been waiting since then, all the way until now.

Prof. Lin knew that Qin Guan was very busy, so he did not take the initiative to look for him. Today, he saw Qin Guan, which was both within his expectations and beyond his expectations