C712 The Old Professors Were All Excited

"Haha!" Good, good! I'm very happy to see you. Your special plastic film and special plastic fiber cloth are the major discoveries of our chemistry field! I've been watching you. " the man said.

"It's just a little thing. It's hard to make it to the grand hall." Zheng Hao said. Since the other party did not introduce himself, Zheng Hao could only be vague about it