C1680 Drag Him out of the Swamp

Three hours later, Zhan Renxun returned to his workshop with good news.

The Zhang's had passed their sample.

They were about to produce big goods, which was mass production.

Shi Miao was pleasantly surprised that Zhan Renxun had solved such a troublesome problem in such a short period of time.

It seemed that Zhan Renxun's ability had improved a lot in these two years.

Two years ago