C3408 Square Umbrellas and Round Umbrellas

After all, compared to materials, their design is slightly inferior.

But who would have thought that Qin Luo would still come!

Facing everyone's words, Qin Luo nodded his head in greeting. "I just came from the laboratory. They are manufacturing high-molecular polyethylene fibers of graphene."

"So I came over to take a look."

"After all, whether it is the material or the design