C1266 Product Upgrade

It had been a long time since the Weapon Graveyard had an exchange. Even Qin Guan felt that he was going to let this system down. Now that he was here, he might as well trade more.

Qin Guan couldn't wait any longer.

The factory was clean and tidy. The heavy cards on the production line were being produced in an orderly manner.

"Now, after our research, we found that most of the heavy cards..