Scientific and technological power starts from the upgrading lens
Kangchi was originally a maintenance worker, but suddenly he got the "item upgrade system". As long as it is made by oneself, it can be upgraded! "Hand rubbing aircraft carriers is a bit unrealistic for the time being, but is it not easy to rub a lens?" So starting from hand rubbing lens, one by one leading technology has emerged. "What do you think is a strong country?" "The enemy retreats ten thousand miles and dare not cross the pool."
·Serials ·1.09 million words